CN1077682A - Reinforced expandable folder - Google Patents

Abstract

A kind of telescopic file, it comprises plate and a plate behind the preceding plate, one, at least one part of the avris of the bottom periphery part of plate and front and back plate before and after this plate connects and form telescopic file.This plate comprises a sheet material with many pleated foldings, and the end folding of its sheet material is wide than other folding, and this end folding be connected to before and after on the plate, to strengthen connection therebetween.This telescopic file also comprises the inner band of strengthening, and this band separates with plate with plate before and after preventing when using file along being provided with to the small part connecting portion between plate and the front and back plate peripheral part.In addition, the outer surface of plate can spread polymer, to increase file resistance and the protected file folder that water permeates is not subjected to disfigurement.

Description

Reinforced expandable folder

The present invention relates to paper spare office appliance, especially have the expandable folder at side, turning and the edge of reinforcement, use so that folder is more firm and durable.

Expandable folder is modern office or commercial indispensable instrument, and generally is used in family and school.This file is made up of rectangle header board and back plate usually, and " Z " font fold is arranged along bottom and side, generally is referred to as plate, and it makes that file can be by launching behind the forward direction.This file transports under impaction state and stores.When coming into operation, along with file is filled file, paper or other article, plate makes this clip trail gradually.

A kind of typical five chip architectures are adopted by a variety of scalable files.This structure comprises the combination of first header board and back plate and side that is attached thereto and bottom plate, also have second header board that links to each other with first header board and back plate respectively with after plate.Usually, the terminal of plate is fixed between first and second plate.

This expandable folder is filled (or excessive filling) file usually, launches fully up to plate, again puts to enter other file.But, filling expandable folder by this way usually can be because at some turnover position or tear at the high-tension position and cause file to damage too early.These turnover positions are most commonly in the interface point between plate and header board and the back plate, the corner of file, the top margin position and the plate itself of plate.

The fully extended file exchange point place between plate and header board and back plate is usually torn; because when the file of these expansion is found when specific file is housed, the consultant can further launch this document folder usually so that consult and take out the file that leaves the inside in.In addition, when the file that takes out must be put back in the file, the consultant incited somebody to action once more expand folder to make a space, so that can successfully file be put in.Yet because plate fully launches, the unique way that allows file further launch is exactly that file is torn at the interface point place of plate and header board and back plate.

Fully extended file is also heavier relatively, and this weight can cause file to damage in every way.For example, only file is picked up usually, can be caused like this that this plate is whole to be pulled down from plate by header board and back plate.In addition, when fully extended file was placed on desk or the desktop repeatedly, the friction on the table of the turning of file, side and bottom can cause file in these position wearing and tearing or damage.This wearing and tearing or damage impair the due neat outward appearance of file, further weaken file, and the little article that cause being clipped in the inside are scattered.When fully loaded file dropped, file can be scattered in around the rum point content of file or the inside along the seam crossing division of plate and front or rear panel.

Expandable folder is also deposited on the top of the shelf usually, and its front and back is vertical with the length of shelf.When taking out these files, generally finger is placed on the top edge of plate, so that file is taken off from frame.Yet,, pull out file by this way and can cause plate to separate with the back plate usually with header board because fully extended file is heavier.In addition, usually pull file with finger again and again from the same position of plate, if things go on like this, dirt and sweat can accumulate in the plate, thereby damage and weaken plate, and cause when the taking-up file plate accident to be torn.

It is moist that this file can become in use, when being transported to another place, a place becoming wet owing to drenching with rain or avenging, or when water or beverage (resembling coffee, tea or soda water) when unexpectedly spilling on it and become wet, or when depositing, become wet because of airborne moisture.When this file become tide or become wet after, they can obviously weaken and be easy to and tear.In addition, moist file can deform, weakens and damage when becoming dry, and, also be very easy in this case tear.

This file generally is to discern by the pressure-sensitive adhesion label that is attached on the front or rear panel.Yet, when needs are removed these labels, owing to adhesion on the label and fiber on the plate can not be separated, thereby file is unmake.Like this, these files are often only scrapped because no longer possess neat outward appearance.

The applicant has recognized the problems referred to above, and need to be sure of a kind of telescopic file that has solved the problems referred to above.Specifically, need the telescopic file of a kind of so durable super-strength, that is: when it is loaded into limiting quantity, can not damage, can prevent that liquid soaks, and can keep neat, firm outward appearance.

The invention provides a kind of telescopic file, it comprises the reinforcement material of the intensity and the durability that are used to improve file.This document folder comprises: have first and second surfaces, also have a header board at the bottom of relative side and one, have first and second surfaces, also have a back plate at the bottom of relative side and one, and one has top, bottom, relative side plate and the telescopic coupling member at two angles.The bottom of this coupling member links to each other with bottom periphery part and their at least a portion side of header board and back plate with relative side plate, like this, the plate opposite first defines the boundary line, inside of file, and they have formed the inner chamber that is used to receive files.

Coupling member comprises the sheet material that a plurality of " Z " shape fold is arranged, and the folding of this sheet material terminal is the wideest like other folding, and this terminal folding links to each other with the back plate with header board, to strengthen the connection between two plates.

The first surface that inside strengthen component can be used for header board and back plate, in case file header board and back plate separate with coupling member in use.Inside strengthen component preferably be installed between the side that is adjacent to coupling member and the plate peripheral part to place that small part is connected.

The corner that also stiffener can be used for coupling member.This stiffener stretches along the turning of coupling member and the part of side and bottom, to improve the wearability of plate.

In one embodiment, reinforcement material is used to the part of each side plate of file and the part of header board and back plate, to strengthen being connected between each side plate and the plate, improves the durability of file.

In another embodiment, this side plate comprises a top, and reinforcement material is used on the top of side plate with the form of endless belt.

Reinforcement material can be fixed on the outer surface of plate of the outer surface of side plate and file, preferably with the endless belt form on the outer surface of side plate and plate, surround the periphery of whole file fully.If necessary, reinforcement material can cover plate and part plate fully.

On the contrary, also reinforcement material can be fixed on the inner surface of side plate and plate to the small part inner surface.Equally, reinforcement material also can the endless belt form use, on the inner surface of side plate and plate, and complete inner rim around whole file, or cover plate and part plate fully.

Reinforcement material can also reinforced sheet form be installed in each junction adjacent side plate upper limb, between side plate and header board and the back plate.First reinforced sheet preferably is fixed on the skin of each header board, walks around the top margin of sides adjacent plate with certain angle, and extends to the internal layer of header board; Second reinforced sheet is fixed on the skin of each back plate, walks around the top margin of sides adjacent plate at a certain angle, and extends to the internal layer of back plate.These reinforced sheets should surmount the width of the plate terminal that is connected, and are distributed on the plate.And the unspecified angle of these reinforced sheets between can also 30 °-60 ° is distributed in the side plate.

Another aspect of the present invention relates to a kind of telescopic file, top margin in the side plate is equipped with stiffener, also stiffener can be used on header board and the back plate, so that the top margin as the side plate when using file provides tear resistance, and the ability that provides anti-side plate and header board to separate with the back plate.

A kind of such stiffener can be made by the top margin of folding each side plate, the mode of formation double layer material.If desired, the useful binders edge that each is folding is fixed in the side plate.In addition, this stiffener can also be on each side plate top margin and extend to strip reinforcement material on the part of its each side.

In another embodiment, each side plate is made up of multi-layer compound structure, and stiffener is to make by the top margin of folding each side plate, and if necessary, useful binders is fixing to form compound sandwich construction.

Perhaps, the terminal part of each side plate and used above-mentioned stiffener needn't be fixed or interconnect.In this occasion, the end of each side plate is provided with the multilayer terminal part, and same separately different plate surface connects.Also more than one terminal part can be loaded on the plate surface.

An alternative embodiment of the invention relates to the stiffener that is used for header board and back plate periphery, and wherein plate links to each other with this stiffener, to improve the tear resistance that is connected between plate and the plate.

This stiffener preferably is made up of a reinforcement material, it is contained on the zone of header board and back plate outer surface side, and, wide with the plate terminal part at least.Very advantageously, stiffener can also be a reinforcement material that is contained on each plate, and it is stretched over a certain position of plate tie point top from the bottom, and, if necessary, can cover whole outer surfaces of each plate basically.

For the embodiment of front, reinforcement material preferably is made up of thermoplastic film, thermoplastic fibres or thermoplastic film/paper compound.

Another kind of expandable folder has an integrally-built header board, bottom plate and back plate, is made by same compact spare.Therefore, a side plate that separates is set connects header board and back plate, the configuration file folder, that compact material and side plate all can be made by the compound of paper, thermoplastic film, thermoplastic fibres or thermoplastic film or fiber/paper.If necessary, the side plate can comprise bottom fitting spare and bottom, be used for being connected with the bottom plate, stiffener can from header board, through the bottom plate be stretched over the back plate on.

According to the present invention, another kind of expandable folder is formed by having the element that is used for the terminal part that is connected with one of plate or side plate, strengthens being connected between each side plate and the plate by this form, and improves the durability of file.Equally, header board, plate, back plate and terminal part can be an integral body, and are made by same compact spare.This terminal part can link to each other from side plate extension and with plate, perhaps, extends from a plate, is connected with another plate through adjacent side plate.Four terminal parts preferably are set, and two are extended from the side plate and to link to each other with plate, and two other extends from a plate, pass through adjacent side plate and link to each other with another plate.

A kind of preferred expandable folder comprises the stiffener of reinforcement material form in the form of sheets, and it has covered the whole outer surface of each plate basically, to improve the tear resistance that is connected between plate and the plate.Other plate is fixed on each stiffener of plate outer surface the plate that is mounted in it with clamping.

Header board and additional plate are preferably made by red keratin material, back plate is made by Manila paper, plate strengthens paper by plastic sheeting and makes, stiffener is made by thermoplastic film or thermoplastic film/paper composites, and the height of back plate is greater than the height of header board, so that can see the top of the inside file, thereby can view the document mark that may be placed on the there.

Can carry out coating to front or rear panel and handle, improving the anti-liquid penetration energy of file, and can avoid unmaking because of labelling, tear the file that label causes repeatedly.

Coating and stiffener can be adopted separately or be adopted simultaneously, to give file required improved performance.Optimal design comprises the whole stiffeners and the combination of coating.

By a following detailed description and an illustrative embodiment of the present invention, can more easily understand These characteristics of the present invention and other characteristics.

Fig. 1 is the perspective view of expandable folder of the present invention.

Fig. 2 is the detailed perspective at expandable folder of the present invention base angle.

Fig. 3 is the cutaway view along the plate of the expandable folder of III among Fig. 1-III line vertical profile.

Fig. 4 is the cutaway view along the cross-sectional plate of IV among Fig. 1-IV line.

Fig. 5 is the plane of not folding plate.

Fig. 6 is the plate longitudinal section along VI among Fig. 5-VI line.

Fig. 7 is the schematic diagram of aniline printing technology.

Fig. 8 is the enlarged detail that is used for the metal adjusting ink roller of aniline printing coating system.

Fig. 9 is another schematic diagram of aniline printing technology.

Figure 10 is the perspective view of an expandable folder, and it has a reinforcement material that centers on whole file fully.

Figure 11 is the perspective view of an expandable folder, and it has through plate and is installed in reinforced sheet on each side of file.

Figure 12 is the perspective view of an expandable folder, the reinforced sheet that it is installed on the top margin of plate with having diagonally opposing corner, link to each other with the back plate with header board.

Figure 13 is the perspective view of an expandable folder, and it has a lid, and on the top of plate and the corner of file reinforced sheet is housed.

Figure 14-19 expression is used for the various plates top reinforcing section of expandable folder of the present invention, and Figure 14 represents the perspective view at plate top, the sectional elevation of the various stiffeners that Figure 15-19 expression is analysed and observe along A-A line among Figure 14.

Figure 20 is illustrated in the folding of turning up plate and folds the front view that the blank that becomes integrally-built header board, bottom plate and back plate before the broken line between plate and the plate is in deployed condition.

Figure 21 represents to connect the side plate of the header board and the back plate of blank among Figure 20.

Figure 22 is that the monoblock blank among Figure 20 is loaded onto two perspective views after the side plate among Figure 21.

Figure 23 is illustrated in and adopts header board and back plate stiffener on five expandable folders, and it can comprise the stiffener of plate top and plate corner selectively.

Figure 24 is the front elevation of three expandable folders being made by same compact material, and it has incomplete external strengthening of component.

Figure 25 is the sectional elevation of the header board of file among Figure 24 along the 25-25 line.

Figure 26 is in the folding of turning up plate and becomes the blank of integrally-built header board, bottom plate, side plate and back plate to be in the front elevation of deployed condition before folding broken line between plate and the plate.

Figure 27 represents is the perspective view of the file that is assembled into by the blank among Figure 26.

Figure 28 represents and the front elevation of the part of the similar blank of Figure 26 that different is that four angles are cut.

Figure 29 represents is the perspective view of the file that is assembled into by the blank among Figure 28.

In U.S. Pat-5,066, can find more fully understanding in 045 to some feature of the present invention, in order to further specify and define these features, special the content disclosed in this patent is inserted here as a reference.

Here used " expandable folder " speech comprises telescopic moneybag, leather wallet, file and books book jacket, has or do not have the lid or the dividing plate that separate or be connected with a plate on it.

Referring to accompanying drawing, especially Fig. 1 and Fig. 2 have represented first embodiment of expandable folder 10 of the present invention here.File 10 comprises the connector of plate 14 forms that the top 13 of plate 12 behind the header board 11,, opening and " Z " shape between header board 11 and the back plate 12 are folding.A part and the whole bottom 16 of the side 15 of plate 14 configuration files folder 10.

Header board 11 comprises from a volume millboard or ivory board (for example red paper leather, red rope slurry paper or Manila paper) 35 internal layer 11a that cuts or be stamped to form and outer 11b.Internal layer 11a and outer 11b are by bonding, punching press or otherwise be connected with each other, and make header board 11.Similarly, back plate 12 comprises by a volume millboard or ivory board (for example red paper leather, red rope slurry paper or Manila paper) 35 internal layer 12a that cuts or be stamped to form and outer 12b.Internal layer 12a and outer 12b are connected with each other by bonding, punching press or suchlike mode, make back plate 12.In addition, also the material self of header board and back plate can be folded and sticks together, to make outside and inner plate.Common arrangement is that the internal layer 12a of plate 12 after Manila paper is used as is used for other three parts with red paper leather, but, can adopt any combining form according to the intended purpose of file 10.

Yet before outer 11b, 12b by a coil paper plate 35 punching presses, the one side of 27 pairs of cardboards 35 of the most handy acrylic coating is prevented liquid handling.The processed one side of cardboard 35 will be as the outer surface of outer 11b, 12b, and coating 27 will play and prevent that moisture from infiltrating the effect of file 10.In addition, coating 27 makes that also labelling, tear label on file 10 becomes easily, and it by the surface of avoiding bonding agent on the label and file 10 actual contact takes place and prevents to unmake because of labelling, tear the file 10 that label causes repeatedly.The acrylic water-based emulsion 36 of the styreneization that coating 27 is preferably bought from the Roymal Co., Ltd (New Hampshire) of Newport, it is used by aniline printing technology, just as discussed herein.

Shown in Fig. 3,4,5 and 6, plate 14 is made by the sheet paper 19 of a lamination, and is with known method that sheet paper 19 is folding, makes it have expansion service resemble the accordion, so that file 10 can progressively launch when packing the object that will deposit into.Plate 14 made of paper has to be enough to along the side 15 of file 10 and the length of bottom 16 extensions, and the width of paper is then selected according to the expansion thickness of required file.Plate 14 finishes with terminal 17,18, and its folding size is near the folding size of plate.Perhaps, the twice that this terminal folding 17,18 can be plate 14 inner foldings 28 at least is wide, or is 7/8 inch wide at least, in any case all than broad.Preferably utilize the spreading width of terminal folding 17,18, it is long-pending with the contact surface of plate 11,12 to increase plate 14, thereby strengthens the connection between the two.But, such plate also can be used for some file, that is: the terminal folding double width of its lateral parts 15, and the terminal folding of its bottom 16 is a normal width, promptly equates with the folding width of inside below.This is because the tension force in the terminal folding of the bottom 16 of plate 14 is big not as the tension force in the lateral parts 15 terminal foldings.Certainly, when the width of all terminal foldings all doubles, the intensity maximum that is connected between plate and the plate.

By last folding of the not folding every end of plate, can realize the prolongation of plate terminal folding 17,18 width or double so that with header board and afterwards plate 11,12 obtain desired width before being connected.Or by making not folding terminal keep the width that suitable length obtains prolonging.When adopting plastics or polymer stiffener in the plate, a kind of scheme in back is more satisfactory, because folding plastic material has folding line, it impels this material to keep its folded state, like this, when plate being assembled to or being worked on the plate subsequently difficulty will take place.

The terminal folding 17,18 of plate 14 can be connected on header board and the back plate 11,12 in a variety of forms, and if necessary, terminal part can be connected on the outer surface or inner surface of plate, as long as the whole surface area of terminal part all is connected on the plate.Because common plate comprises part and outer matrix section inside, from aesthstic angle, preferably the plate terminal part is connected between inside and outside two parts of plate.For this reason, this terminal part was located in before two parts of plate connect between the internal layer and skin of header board and back plate 11,12, like this, when two parts of plate connected in the above described manner, the terminal folding 17,18 of plate 14 just had been connected in together with header board 11 and back plate 12.In addition, the terminal part of plate 14 can have suitable viscosity to strengthen the bonding strength of itself and plate.

Before sheet paper 19 is folded into plate 14, preferably with TYVEK (Dupont company is the trade mark of the olefine registration of rotation bonding) or some other waterproof and durable material are attached on the sheet paper 19.Compare with existing expandable folder in the prior art, this reinforcement material will improve the intensity and the tear resistance of file 10.

The primary importance of plate reinforcement material is whole length and the width along sheet paper 19 one sides.This stiffener will be taken as enhancement Layer 20.Although enhancement Layer 20 preferably only is connected that side of the outer surface that will become plate 14 of sheet paper 19, similarly enhancement Layer 20 yet can be connected the opposite side of sheet paper 19, so that the two sides all is reinforced.Enhancement Layer 20 will avoid folding 28 to stretch repeatedly and the contraction reshaping because of file 10, and the liquid infringement is avoided in protection plate 14.

Residing second position of reinforcement material is on a certain position of enhancement Layer 20, and these places will become the angle 23 of file 10 subsequently.Sheet paper 19 is being folded into plate 14, and plate 14 has just formed angle 23 when being connected on the surface of header board 11 and back plate 12.This stiffener is called as angle filler strip 21.These angle filler strips 21 preferably extend along the whole width of whole enhancement Layer 20 as shown in Figure 4.Angle filler strip 21 is reinforced angle 23 with enhancement Layer 20, and makes it have good tear resistance, as hereinafter will discussing.

Residing the 3rd position of reinforcement material is the common edge 25 of sheet paper 19 and enhancement Layer 20.This stiffener is called as edge filler strip 24, and edge filler strip 24 adheres to along the overall with on sheet paper 19 tops, covers common edge 25, and adheres to (seeing Fig. 3,4,6) along the overall with on enhancement Layer 20 tops.Edge filler strip 24 and enhancement Layer 20 together, dirt and moisture infringement are avoided in protection plate 14 tops, and provide additional lear energy for plate 14.

Just as noted earlier, Zui Jia reinforcement material is TYVEK Thermoplastic film, it comprises that one deck is used for the bonding agent of plate 11,12 or plate 14 connections.But, thermoplastic film or the adhesive tape acquisition similar effects with other also is possible.And, paper slip is bonding or otherwise to be connected to the position that will strengthen also be feasible.If like this, preferably adopt the paper wood of handling through polymer coating, or adopt the paper of plastic lamination, so that can prevent the sealing infiltration.

Plate 14 preferably is connected on header board 11 and the back plate 12 by bonding, punching press or alternate manner, terminal folding 17 is connected between internal layer 11a and the outer 11b, and internal layer 11a and outer 11b interconnect, by bonding, punching press or alternate manner terminal folding 18 is connected between internal layer 12a and the outer 12b, and internal layer 12a and outer 12b also interconnect.Therefore, internal layer 11a, 12a extend to outermost end 17a, the 18a of first and last folding of plate in fact respectively.It is also conceivable that terminal folding 17,18 is only linked to each other respectively with the inner surface of internal layer 11a, 12a, or link to each other respectively with the outer surface of outer 11b, 12b.No matter adopt which kind of connected mode, terminal folding 17 all is to place along the vertical edge 11c of header board 11 and base 11d, and terminal folding 18 is placed along the vertical edge 12c and the base 12d of back plate 12.

Just as mentioned above, terminal folding 17,18 preferably has the width of prolongation, and it is at least the twice of inner folding 28 width or is at least about 7/8 inch, in any case be broad some.Like this, compare with the surface area that is connected of existing file folder, it is very large that plate 14 is connected to the surface area that header board 11 and back plate 12 get on, and, terminal folding 17,18 respectively with header board 11 and back plate 12 between be connected also very firm.Therefore, if the plate 14 of on the direction that is parallel to header board 11 and back plate 12, drawing file 10, plate 14 can not resemble the existing file folder from header board 11 and afterwards plate 12 separate or tear.

After file 10 assembles, other stiffener can also be installed, so that it possesses intensity and the lear energy bigger than existing expandable folder.This stiffener is contained on the exposed surface of internal layer 11a to top margin 11e along vertical edge 11c from base 11d with the form of inner reinforced sheet 26.Similarly, inner reinforced sheet 22 is contained on the exposed surface of internal layer 12a to top margin 12e along vertical edge 12c from base 12d.Inner reinforced sheet 26,22 can be guaranteed fully to launch in plate 14, during file 10 tensionings, promptly when file 10 undue expansion, internal layer 11a, 12a have the ability that bigger prevention separates with plate 14.

In addition, external reinforcing sheet 29 is attached on the exposed surface of outer 11b to top margin 11e along vertical edge 11c from base 11d.Similarly, external reinforcing sheet 30 is attached on the exposed surface of outer 12b to top margin 12e along vertical edge 12c from base 12d.External reinforcing sheet 29,30 makes file 10 have bigger structural stability and durability.

As mentioned above, before the outer 11b, the 12b that make plate 11,12, coating 27 is coated on the cylinder board 35 by the aniline printing technology.The aniline printing technology is a kind of known rotary printing mode, by rubber or other elastic material board flexographic ink or other layer of chemical substances is coated on the various surfaces.The aniline printing technology very is adapted at being coated with on the more coarse surface application layer 27.

Employed in the present invention aniline printing technology preferably repeats twice to form coating 27.Therefore, coating 27 preferably includes an internal layer 27a and an outer 27b.As shown in Figure 7, in the aniline printing process, use usually: store black groove 40; Be contained in the side angle screeding device 31 on the black groove 40 of storage; Metal with respect to black groove 40 of storage and scraper plate 31 runnings is regulated ink roller 32; Regulate the plate cylinder 33 of ink roller 32 runnings with respect to metal; And impression cylinder 34, it is exerted pressure to the cylinder board 35 between impression cylinder 34 and the plate cylinder 33.

As mentioned above, coating 27 is acrylic water-based emulsions 36 of styreneization.Yet, because the viscosity that emulsion 36 is passed through No. 2 efflux viscosimeters is generally greater than 3 minutes, so needed this viscosity is reduced before forming internal layer 27a and outer 27b.Therefore, before cardboard 35 forms internal layer 27a by aniline printing technology for the first time, store black groove 40 the fluid 36a that is made up of water and emulsion 36 should be housed.The viscosity of fluid 36a by No. 2 efflux viscosimeters is at 55-60 between second.Similarly, before cardboard 35 forms outer 27b by aniline printing technology for the second time, store 40 li of black grooves the liquid 36b that is made up of water and emulsion 36 is housed.Fluid 36b is 25 seconds by the viscosity of No. 2 efflux viscosimeters.

As shown in Figure 8, engrave little groove 38 by known plastics forming technique on the whole surface of elastic rubber slab 39.The average of little groove 38 generally is approximately 100,000 on the area per square inch, and but, according to the needs of purposes, the number of little groove 38 can be 30, and 000-300 changes between 000.Then rubber slab 39 is fixed on metal and regulates on the circumference of ink roller 32, the opening of little groove 38 is radially outside.

This aniline printing device carries out operation by pasting the fluid 36a rotation metal adjusting ink roller 32 of storing 40 li of black grooves, and metal is regulated the little groove on ink roller 32 surfaces and adorned fluid 36a for 38 li.Along with the rotation of metal ink roller 32, scraper plate 31 scrapes off unnecessary fluid 36a from the surface of metal ink roller 32.Plate cylinder 33 contacting metal ink rollers 32 rotate, and the inclusion of 38 li of little grooves is transferred to the surface of plate cylinder 33 and formed a layer fluid 37a there.Because the size of little groove 38 is accurately control, so the density of fluid layer 37a is quite even on the plate cylinder 33, its deviation is about 2% or littler.

Plate cylinder 33 rotates continuously, thereby uniform fluid layer 37a is transferred on the cardboard 35.In order to the auxiliary rotation of impression cylinder 34 of impression cardboard 35 between plate cylinder 33 and impression cylinder 34, guarantee that fluid layer 37a transfers on the cardboard 35 and forms internal layer 27a there.

As shown in Figure 9, aniline printing technology recited above is repeated again one time subsequently, stores black groove and 40 li fluid 36b is housed, so that form outer 27b on internal layer 27a surface, thereby forms coating 27 on cardboard 35.Cardboard 35 through cutting platform or punching press platform, is made outer 11b, 12b with cardboard 35 here then.Therefore, the coating 27 that is coated on file 10 outer surfaces can prevent that liquid is penetrated into 10 li of files, and prevent that file 10 is because of labelling repeatedly and tearing label and cause and unmake.

Figure 10 represents the expandable folder 110 that its basic structure and material are all identical with file 10 among Fig. 1.File 110 comprises header board 112 and the back plate 114 that is connected together by scalable plate 116, the base and the side 118 of plate 116 configuration files folder 110.Header board 112 is made up of inside part 120 and Outboard Sections 122.Similarly, back plate 114 also is made up of inboard top layer 124 and Outboard Sections 126, and this document presss from both sides along open top, so that file, data and other article to be deposited are inserted wherein.

In order to strengthen plate top, a circle reinforcement material 134 is contained on the lateral parts 118 and back plate 114 of header board 112, plate 116, thereby surrounds whole file 110 with the connection between the plate.Reinforcing band 134 is contained in the local of adjacent files folder 110 each face apical margin and covers the terminal part 130 of the plate that is connected the there.Although other size also can be used, the reinforcing band width preferably is about 1 inch.

Reinforcing band 134 is preferably made by thermoplastic material, resembles TYVEK

Thermoplastic material, it comprises top bonding agent, is used for reinforcing band is connected to the side 118 of plate 112,114 and plate 116.On the contrary, if TYVEK

Material is not coated with full adhesive, can reinforcement be fixed on the file 110 with suitable sicker or other adhesive.This TYVEK

Material is made into adhesive tape or fabric usually, and is in turn laminated on the substrate (for example paper).In addition, other thermoplastic film or adhesive tape also can be used to make reinforcing band 134.These films or adhesive tape also can be coated with full adhesive, or with the suitable adhesive or the sicker that are coated on reinforcing band 134 or the file 110 reinforcing band 134 are fixed on the file 110.The adhesive tape that contains glass fibre or other fiber also can be used as reinforcement material.And the laminated product of compound plastic sheeting/paper is with or without adhesive gasket, can be used for making the adhesive tape that has certain intensity even further improved intensity.

As mentioned above, expandable folder 110 is filled to the limit or excessive filling by stored file and article usually.When file is taken out from file and relays back, to or be expanded to its limit with fully loaded file stretching, to some position of file 110,, and often cause tearing in these junctions as the junction generation tensile force of plate 116 with plate 112,114.In addition, when when file cabinet or cubbyhole are taken file, only catch a plate of file to pull it often, this just causes plate 116 to separate with plate 112,114 through regular meeting.When the file of filling drops on the ground, also can cause tearing.Reinforcing band 134 is loaded onto in junction at plate 116 and plate 112,114, can strengthen file 110, and prevents that plate from separating with plate when file being applied the power that stretches or expand and so on.Therefore, the present invention is to provide a kind of expandable folder that has increased intensity and durability, this is with the service life of file lengthen folder.

In an alternative embodiment of the invention, banded reinforcement material can be attached to the inner surface of file, can install separately; Or with 134 installations of external reinforcing band.Inner reinforcing band is best and the said external reinforcing band is wide, and preferably is installed in contiguous plate 116 sides 118 upper edges, and the plate 116 of the internal layer 120,124 of overlay 112,114, and covering respectively is connected the terminal part 130 there.In this way, inner reinforcing band strengthens further that those of plate 116 sides and plate 112,114 junctions are the most frequent to apply the position of tensile force and expansionary force to file, thereby makes these positions have better intensity and durability.

Inner reinforcing band preferably also is by a TYVEK

Material is made, and it has the back side that is coated with full adhesive, and is attached on the side of header board 112, back plate 114 and plate 116.As mentioned above, the back side coat or not other suitable reinforcement material of coating adhesive also can be used as this reinforcing band.

Figure 11 represents an alternative embodiment of the invention, a kind of expandable folder 140 of reinforcement, and wherein similarly part adopts identical numbering.On file 140, the reinforcing band 142 of two separation is used to strengthen the coupling part between plate 116 and header board 112 and the back plate 114.Each reinforcing band 142 is made by commaterial, and wide with above-mentioned other reinforcing band, still, and the part of the skin 122 of the side 118 of the part of plate 114 skins 126 and plate 116 and header board 112 after 142 coverings of reinforcing band.Reinforcing band 142 is contained in respectively on the outer surface 122 and 126 of header board 112 and back plate 114, covers the width of plate 116 terminals 130 that are connected the there.Reinforcing band 142 provides extra intensity and supporting by this way when tensile force or expansionary force being applied to the junction of plate 116 and plate 112,114.Like this, reinforcing band 142 can prevent that plate 116 from tearing or separate from plate 112,114, and increases the durability and the life-span of file.

If desired, the terminal of reinforcing band 142 can be placed between the plate for aesthetic reasons.In the present embodiment, plate with reinforcing band 142 with before outside plate links to each other, only be connected with inboard plate.Perhaps, can also before outer panel spare connects with plate, reinforcing band 142 be connected with outside plate, more inboard plate be linked to each other with outside plate subsequently.The third design is after plate connects with plate reinforcing band 142 to be connected on the inboard plate.In this scheme, reinforcing band 142 is extended to the top of plate, tear resistance is provided for these positions.

The example of another kind of expandable folder 150 illustrates that in Figure 12 same, similarly part adopts identical numbering.The top corner 152(that has been found that expandable folder 150 here, the apical margin of plate 116 is connected with plate 112,114) be to be easy to the heavily stressed position damaged because of tearing.Therefore, file 150 comprises the reinforcement material that is contained in these top corner 152 places, in order to strengthen the lear energy at these positions.Reinforcement material is contained in junction, turning 152 as four bands or bar with about 45 ° angle, and its width is preferably the 1-2 inch.Compare with the reinforcing band that level among Figure 10-11 is installed, these reinforcing bands are installed at a certain angle will be provided additional resistivity for opposing vertical separation forces and opposing horizontal separation power.

Preferably cover the upper corners of the side 118 of the plate 116 that is close to header boards 112 by first pair of reinforcing band 154.Each reinforcing band 154 is contained on the outer surface 122 of header board 112, and the junction, turning 152 of walking around plate 116 obliquely links to each other with the inner surface 120 of header board 112.Similarly, the second pair of reinforcing band 156 covers the upper corners 152 of contiguous back plates 114, and here, each reinforcing band is contained on the outer surface 126 of back plate 114, and walk around obliquely upper corners 152 with after the inner surface 124 of plate be connected.These reinforcing bands can be with arbitrarily angled installation in 30 °-60 ° scope.

Reinforcing band 154,156 is installed on the inner surface and outer surface of plate 112,114 simultaneously, and like this, reinforcement material has just exceeded the width of the terminal 130 of the plate 116 that is connected the there.Reinforcement material surpasses the prolongation at this position, when people apply tensile force and expansionary force to plate 116, can provide additional strengthening effect and intensity, advantageously increases the durability and the life-span of expandable folder 150.

When inboard that utilizes plate and Outboard Sections, can after the outer surface connection of plate, before the Outboard Sections with plate connects, reinforcing band 154,156 be installed with inside part.Therefore, after the Outboard Sections of plate connects, only can see reinforcing band 154,156 in the inside of file.If desired, can cover the visible part of reinforcing band 154,156 with back boxing.

Perhaps, also can after plate is connected on the inner surface of Outboard Sections of plate, reinforcing band 154,156 be connected on the Outboard Sections of plate.Subsequently, the inside part with plate is connected on the Outboard Sections to cover plate and reinforcing band.In this scheme, only can see reinforcing band 154,156 in the outside of file.If necessary, the visible part of reinforcing band 154,156 can cover with above-mentioned cover strip, or is covered by other plate that is fixed on the plate Outboard Sections.

Described in embodiment above, reinforcement material is preferably by TYVEK

Material is formed, although other suitable material also can use.Moreover reinforcement material can be that the back side is coated with full adhesive, or is connected on the file by sicker or the adhesive that is coated on reinforcing band or the file.The optimal material that is used for this reinforcing band is the TYVEK that includes the viscosity back side

Material reinforcement paper.

All embodiments of the invention among Figure 10-12 may further include the other stiffener that is contained in bottom corners and is contained in the inside and outside both sides of plate.

Figure 13 represents another kind of file 160, and similar portions also adopts identical numbering here.This document folder comprises turning reinforcement 162, for these parts of file provide additional tear-proof and wear resistance.Equally, the upper design of back plate 114 is become a lid, be used for the file parking space of protected file folder.This lid preferably has many concaves, to adapt to the various development sizes of file.In addition, lid comprises that also tie-rod, elastic webbing or other are fixed on the folder, make it be in the device of closed condition.If necessary, this file of the present invention or other file can be designed to comprise internal partition or comprise separate sheet.

For the top that prevents plate tear with near the plate the limit of strengthening plate and its top be connected, shown in Figure 14-19, in the applied on top of this plate various types of reinforcements.

Shown in Figure 14 is in the end 130 of plate and plate 116 before plate connects.At the top of plate 116 reinforcement 170 is set, tears or prevent that with prevention it is separated from from this plate.In one embodiment, the top of plate is that himself reflexed is come, and with glue or bonding and form reinforcement 170 with a kind of bonding agent.This top is folding unimportant toward which direction, that is, can fold laterally to the inside or as shown in the figure.Under the situation that plate is made up of single piece of material (for example using paper), its top is the pair of lamina material, and it sticks with glue knot together, has increased tear resistance.The inner surface of end 130 also all imposes colloid or certain bonding agent, or has adhesive linkage on one or both sides, in order to paste on the plate.This reinforcement plate can be connected to the inboard or the outside of plate.When using inner panel and outside plate, though as mentioned above, use the plate between this plate to connect usually, this reinforcement plate can be connected on any surface of two plates.

As substituting of top self reflexed of plate 116, can adopt a kind of band reinforcement in a side of plate 116 at the plate top end.This material can be made up of various materials widely, and these materials comprise paper, cardboard, a kind of polyethylene, polypropylene, TYVEK The plastic sheeting of material or its similar material.This plastic sheeting can contain natural or synthetic glass fibre or fiber harness, so that further tear-proof or wearability to be provided.Adopt certain suitable adhesive, this desirable reinforcement material can be bonded in this plate, this adhesive can impose on the reinforcement or impose in this plate.In addition, this reinforcement material can comprise certain bonding agent veneer, to simplify the connection to plate.Moreover, can be designed as two-layer on the top of this plate.

For the situation of tear-proof largely, can adopt reinforcement material and all use reinforcement material on the top of plate in the inboard and the outside at this top.The cross section of one side of the plate of present embodiment has been shown among Figure 15, has wherein illustrated a kind of paper plate 172 and the TYVEK that are adopted

Film enhancement Layer 174.This paper plate 172 has two enhancement Layers 174.In addition, the width of end 130 is twices of the width of plate folding, so that be connected to more reliably on this plate.Under the situation that adopts a plate 178, end 130 is subjected to certain glue or suitable bonding agent is connected with plate 178.Under the situation of using two plates 178,178A, glue 176,176A are applied to each side of plate end 130, to be connected reliably on plate 178, the 178A.

Figure 16 shows reinforcement 170 is connected to another alternative connectivity scenario on two plates 178, the 178A.In this programme, reinforcement 170 also is free of attachment to end 130.But the end of reinforcement 170 is connected on the plate 178A, and the end 130 of connector 116 is connected on the plate 178.As with reference to shown in Figure 15, colloid 176,176A or other suitable bonding agent are imposed on this end so that help to obtain reliable connection to plate 178,178A.

Figure 17-19 shows the other method that the top of plate can be reinforced.In the present embodiment, plate is strengthened paper by plastic sheeting and is constituted, and the top of plate is himself reflexed and is fixed together.This scheme provides a kind of layer structure 180, and this structure is: have 4 layers at the top of plate, that is ply of paper 182,182A and TYVEK

Material layer 184,184A.Figure 17 shows by adhesive 188 end 130 of this layer structure is connected to situation on the plate 186.

Figure 18 shows this layer structure 180 is connected to a kind of alternative connectivity scenario on two plates 186, the 186A.In this programme, the end 130 of plate is divided into double ended, and each end all has the TYVEK that invests on the paper

Reinforcement material, this programme can also be realized by other parts that reflexed partly do not pasted plate.In view of the above, an end of being made by paper 182 and film 184 is attached on the plate 186, and the other end of being made by paper 182A and film 184A is adhered on the plate 186A.As mentioned above, colloid 188,188A or other suitable binding agents are applied to these ends, so that help to obtain the reliable bonding to plate 186,186A.

Figure 19 shows another kind of connectivity scenario, and at this, each layer 182,182A, 184, the 184A of layer structure 180 do not connect mutually in this.This just provides to a great extent these layers has been connected to versatility on the plate.For example, a preferred scheme is with TYVEK

Material 184,184A are connected respectively on plate 186, the 186A.Because TYVEK

Than the papery layer stronger intensity is arranged, therefore can obtain stronger connection.According to the design of file, all can adopt TYVEK in each side of corresponding plate

Material.In addition, this plate also can be sandwiched in this TYVEK Between material and the ply of paper.According to the structure of needed file, can also conceive other scheme, and the present invention various possibilities have been envisioned.

If expectation obtains plate is connected to bigger bonding strength on the plate, the extra play of plastic material can be added to the place at these plate tops.According to desired specific purposes, the designer is the suitable enhancement Layer of this document folder preferably.

Should be noted that, for each connectivity scenario of Figure 14-19.The side of plate all stretches to first fold line of plate, and therefore, the whole surf zone of the respective side of the end of this plate all is bonded on the plate.As mentioned above, if area bonded or that be connected to the end of this plate is got maximum, so just can obtain the most reliable connection.Be that this connection all has maximum intensity.

See also Figure 20 now, it shows a whole base substrate 200, and this blank 200 comprises a header board 202, bottom plate connecting sheet 204 and back plate 206, and they are used to form file.At the tabs 208 that is converted into plate with before folding plate and plate broken line 210, the side of the outer surface of the back side of this blank that is formation file illustrates with a plan-position.This blank 200 can by any monolithic flat, have flexible material to make, wherein, be typically the ground paper spare of ideal weight.For the telescopic file that requires to have higher-strength, but then blank 200 by polyethylene, polypropylene, TYVEK Or the plastic sheeting of similar material makes, or made by a kind of poly-paper compound or lamination.

At least on the outer surface of plate and header board and side plate, one deck enhancement Layer is set, to protect the file of frequent use.The reinforcement of the minimum that is adopted can be a strap, and this band covers the bottom plate of file and the broken line of plate one plate.This reinforcement is the zone between the side 212,214 of chain-dotted line A and B and blank 200 in Figure 20; it file clamp emphatically paper spare or alternative document along file cabinet bottom or when the surface of a workbench is dragged, protection this document folder is not frayed and this document is held to strengthen.This band can be when this paper be by guillotine at an easy rate lamination be connected on this blank.In addition, but this band sticker to this paper, maybe can be by the liquid coating that is subjected to like that as described herein.

The whole blank 200 of Figure 20 has the level depression 208 of many wrinkle, and this depression is folded or wrinkle form, to form end plate.The folding 208 of these plates is used to flexible file, to load a large amount of paper spares.Know that all original the sort of unstiffened plate is acarpous in the place of its broken line, because this cardboard can be torn to shreds along broken line when flexible.Can be sure of that when this document is clipped in when wearing and tearing in the use, the wearing part that this reinforcement is of value to cardboard links together.Yet, be surprised to find that, along enclosing reinforcement on the fold line of plate, in fact increased the service life of file, do not split at the fold line place when not being reinforced or tear because cardboard can not resemble it.

Advantageously, make reinforcement extend to header board and back plate will that side area of bonding side plate on.This zone is the zone between the side 212,214 of chain-dotted line C and D and blank 200 as shown in figure 20, and it can adopt banded reinforcement material to strengthen.These bands should be wideer than the end of the plate that will be adhered to this plate side.

As shown in the figure, the side part along plate can adopt many such bands, is perhaps using single strip along each side of blank perpendicular to the direction of bottom band.The avris band can place adjacent bottom band place, and perhaps they can overlap.The arrangement of this band or to be provided with the present invention be not most critical.For hand-made file, this can be prepared into a kind of monoblock of H shape along the reinforcement material of avris or bottom, is put into then on this blank.

Best, this enhancement Layer of employing is a monolithic or a slice reinforcement material.In one embodiment, this sheet material can extend to the back plate by the bottom plate from the header board in a place of the junction top that is positioned at the avris plate, arrives at the place on the link position of avris plate.This scheme is similar to and adopts the bottom reinforcement, has just used the reinforcement of wider lane, that is, and and a band that between chain-dotted line C and D and blank 200 sides 212,214, extends.This scheme is superior, because as the plate side junction of a hard point of file, also can come together to strengthen with plate junction, bottom.

Alternately, this reinforcement sheet material can extend and covers this surface in the whole outer surface of blank 200, to obtain the reinforcement of whole outside.In this structure, bottom plate, side plate are connected the side of the header board and the back plate at place, and the top of adorning the plate of mark, label or alternative document label usually, and all is reinforced.The whole outer surface that this enhancement Layer is used for strengthening with the protected file folder is not subjected to the frequent wearing and tearing of using.In addition, when that fill and/or heavy file moved in document drawer, this enhancement Layer played and prevents the phenomenon of tearing that may occur.

This reinforcement material can be made up of various materials widely, comprises paper, cardboard, polyethylene, polypropylene, (Arathene) TYVEK

Etc. similar plastic sheeting.This plastic sheeting can comprise natural, synthetic glass fibre or fibre bundle torn or worn and torn preventing.This reinforcement material can first simple layer be pressed into blank, just makes suitable fold line then.Can use a kind of suitable bonding agent, selected reinforcement material is attached on the file as on reinforcement or file, applying.And this reinforcement material can comprise a kind of bonding agent veneer, to simplify the connection to blank.Substitute as a kind of of single sheet material or film, can adopt the reinforcement band of this material, so that on selected position, provide booster action.Moreover these bands can be connected on the blank by lamination or with glue or bonding agent.

Utilize pressure, this reinforcement material can be connected on the cardboard, the utilization lamination has been realized booster action at an easy rate.As for present embodiment, reinforcement material and cardboard can pass through between two rollers simply, and these two rollers give necessary pressure these materials are bonded together each other.Necessary, also may adopt as the liquid or the solution of polymer or resin and make reinforcement material, they can be cured after being bonded on the cardboard.Other polymer or cold coating also can be used as reinforcement.In addition, can directly several pieces plastic reinforcements be expressed on this cardboard.

Also have, when polymer or plastic material during as enhancement Layer, then as if this document folder is anti-the liquid that coffee or water are such, and in the such environment of office, they splash on the file probably when file is extracted out in the drawer of dress file.Also have; on outermost plate, adopt whole transparent plastic or polymeric layer to make enhancement Layer and can obtain other benefit; i.e. easier and dyeing or the colouring more cheaply of the file that this plate can be more previous; because this reinforcement material is protected part these dyeing or colouring, therefore can use more cheap dyestuff, colouring agent or pigment.In addition, the method for less expensive be can adopt, these pigment, colouring agent and dyestuff used, and, can use through painted enhancement Layer and give file desirable color.

Figure 21 shows the avris plate 220 of the blank 200 that is used for Figure 20.This plate is by the material of tear-proof or resistance to fracture, as polyethylene, polypropylene, TYVEK

Plastic sheeting and analog thereof make.This plastic sheeting can contain natural, synthetic glass fibre or fibre bundle torn or worn and torn further preventing.In addition, this plate can be made up of the paper composites or the laminated material of applied plastic.

The avris plate of Figure 21 has many vertical depressions 222, and they are folded or wrinkle form and are used for file is opened so that the plate folding of the more file of splendid attire.Previous non-reinforcement plate is easy to damage in these fold line parts, because opening or when folding, this cardboard can be torn along this fold line.As mentioned above, in fact the reinforcement of this plate 220 has increased the service life of file, and this is because this cardboard can't be as it without this reinforcement described herein, ruptures at the fold line place or tears.

The avris plate of Figure 21 can also be used to strengthen the avris plate of common file.This plate 220 is connected on the plate of any file after can connecting in common plate.For example, after can connecting in common plate, plate 220 is connected to the outer surface of inner panel for five folder structures.According to the embodiment of various replacements of the present invention, can extend visualizes other scheme.

The end 230 of avris plate can be normal width on being connected to plate the time, and promptly the width with the plate folding is identical basically, or is the double-width of above-described plate folding, to gain in strength.For example for the specific blank of Figure 20, when strengthening, preferably make the end of avris plate be connected to the outside of this plate.Each blank comes the composing document folder with two this avris plates.Can utilize suitable bonding agent, it is coated on plate or both ends and these ends 230 are connected on this plate.In addition, this avris plate end 230 can comprise a kind of bonding agent veneer, to simplify the connection to the avris of these plates.Though preferably these ends are bonded to the outside of plate,, according to the designing requirement of certain file, they can be connected to the inboard of plate.

In one embodiment, the angle relative with the bottom plate, the bottom of avris plate do not connect, and 240 among Figure 22 shows the file that constitutes this structure.Though for some telescopic file, this structure is satisfied,, be preferably in the angle joint these assemblies are coupled together, and preferably strengthen such connection.By prolonging the length of avris plate simply, and the end of avris plate cut off to form a contact pin 224 along line shown in Figure 21 226, folding the bottom of avris plate along the chain-dotted line 228 that between two cut-off parts, extends, then contact pin is linked on the plate and also will link in the plate of bottom, so just formed a kind of connection in the bottom 232 of the avris contact pin of extending between two contact pin.As mentioned above, can utilize glue or a kind of bonding agent, the contact pin 224 and the bottom 232 of avris plate 220 adhered in plate and the bottom plate, glue or bonding agent can spread on arbitrary member.

Can be in addition, the bight reinforcement can be added by a slice of extending in the avris plate or independent reinforcement material and is affixed in the plate of bottom and part adds and is affixed on the plate and realizes.This bight reinforcement can be made by the tear-resistant or anti-material that breaks, aforesaid the sort of material as the avris connector.Best, the bight reinforcement is made by the paper composites or the laminated material of applied plastic, and this plastic composite and bight reinforcement coating glue or a kind of bonding agent connect.

Shown in Figure 23 is the best folder structure 250 of unitary blank example, wherein is similar to the parts of describing among Figure 20-22 and has corresponding label.Done to strengthen and used the avris plate 220 with the contact pin 224 that is used for connecting the bottom plate except the whole outside of blank, also had many further reinforcement files and obtain the feature in best service life.The top of avris plate is strengthened with one of additional structure among Figure 14-19 252, and the bight of file is further strengthened with the adapter of plastic-coated composite material of cardboard 254.In order to strengthen the appearance of file, the outer surface of the plate 202,206 of blank 200 is equipped with additional header board and back plate 256.

Replacedly, the plate 256 that need not add, but along the side of the plate 202,206 of blank 200 is at avris connector/be provided with topped above the plate connector.In this scheme, can make by a kind of above-mentioned reinforcement material for topped, to increase the wearability at these positions of file.

Adopt the structure of five common files can dress up a kind of similar file, i.e. header board and afterwards plate, each all has interior plate and exterior panel, and is all connected by a plate.In the present embodiment, header board and the interior plate of back plate and the plastics enhancement Layer that outer surface can comprise the topped whole outer surface of one deck.This plate is preferably by TYVEK

The lamination paper wood is made.Bestly be, adopt red leather wallet to make the material of plate in the material of exterior panel and the header board, then the interior plate of plate is made by Manila paper.In being connected to, this plate end on the reinforcement of plate outer surface, just connects exterior panel then.As mentioned above, can be at the top of plate, in the bight of plate, at the outer surface of exterior panel or the additional reinforcement of inner surface connection of interior plate.

Figure 24 and shown in Figure 25 be a kind of in addition preferred expandable folder 260, wherein, be similar to the parts shown in Figure 20-21 and have corresponding label.The outer surface reinforcement 262 of blank is just in time walked around on the position of the top, just in time avris plate junction of bottom plate to another plate from 264 tops, avris plate junction that are positioned on the plate.If necessary, can be by covering the connection 230 of avris plate, stick additional plate or topped, to strengthen the appearance of file.Also have, the outer surface reinforcement of blank can extend to the top of the appearance of back plate 206, will adorn label or other file zone that indicates and the possibility that reduces to damage by pressure or bend plate top, back to strengthen.

Use five common folder structures can also constitute a kind of similar file.In the present embodiment, as shown in figure 24, the outer surface of the interior plate of header board and back plate comprises the plastics enhancement Layer of the outer surface of the topped bottom of one deck.This plate is preferably by TYVEK

The laminated paper of this material is made, and with the interior sheet material of red leather wallet as outside material and header board, then the interior sheet material of plate is made by Manila paper.This plate end is connected on the reinforcement of interior plate outer surface, and then connects outside sheet material.As mentioned above, Fu Jia reinforcement can be attached on the inner surface of the outer surface of bight, exterior panel of top, this plate of this plate or inner panel.

Though the preferred structure of Figure 22-25 comprises the avris plate is connected on the reinforcement on the blank outer surface, also this connection might be set on the inner surface of blank.In the present embodiment, reinforcement material is attached to the inner surface of blank with the above-mentioned same way as that is used for the perimeter.For present embodiment, previously described blank can turn at an easy rate, and promptly its outer surface can become inner surface.

Glue of the present invention and bonding agent have also embodied another the superior part than prior art.Generally speaking, cold glue or bonding agent all are used for the assembly of telescopic file of the standard of connecting usually.Because assembly of the present invention made architecture advances, this glue commonly used also is applicable to makes file of the present invention, even is used between the assembly as bigger improved junction is arranged between plate and the plate, yet, had better use hot-melt adhesive herein.These bonding agents make an assembly be packaged on another assembly effectively.Thereby eliminated the bonding agent tie point basically and connected bad possibility.As a rule, the intensity of tie point is big than the intensity of assembly.

Another advantageous method is to utilize to have the connection of cohesive force that two plastic sheetings are fixed together.And the intensity of junction equals the intensity of plastic material, so tie point is damaged hardly, even breakage takes place, also can not tear or damage plate to shreds.

In addition, another new scheme of the present invention is the material that is used for the file assembly, and for example, plate, plate and reinforcement can be by a kind of synthetic papers, as by DURALON

(Arlon company (Arlon, registration mark lnc)) makes, and this material presss from both sides one deck polyester material between two-layer common paper.DURALON Material has high strength and tear-resistant.And these assemblies can be made of plastics fully, and its connection utilizes ultrasonic bonding to finish.This structure has the highest moistureproof moist and wearability in all above-mentioned materials.Because these assemblies are welded together, its brace also intensity with the material that is used for making assembly is the same strong.Use another advantage of these improved adhesives and connected mode to be, because the characteristic of structure reinforcement comprehensively to assembly material, therefore can not adopt above-mentioned structure reinforcement.And, owing to adopt the intensity of the junction of this reinforcement to be substantially equal to the intensity of assembly material, therefore, can not adopt the end extension device of plate or whole fixture of other connections.

Now referring to Figure 26, wherein illustrate a unitary blank 270, this blank comprises a preceding plate 272, bottom and avris plate 274 and the back plate 276 that forms file.The back of blank promptly forms the side of file outer surface, is to illustrate with open and flat position, will be converted into the broken line 280 of plate broken line 278 and plate-plate afterwards.This blank 270 can be with making corresponding to above-mentioned any material of the blank 200 of making Figure 20.For the expandable folder that requires maximum intensity, blank 270 can be used polyethylene, polypropylene, commodity TYVEK by name The plastics of analogs such as Arathene or plastic-coated paper composite or its laminar structure make.

If with the material of cardboard as blank, then on the outer surface of plate and on header board and back plate an enhancement Layer is being set at least, its set-up mode is described the same with the blank 200 of above-mentioned Figure 20.

Best, this enhancement Layer extends and it is topped along the whole outer surface of blank 270, so that strengthen whole outside.This facilitates makes whole file all by the laminated material of the paper of plastics or applied plastic film or the file that composite is formed.Adopt such material, even five common folder structures have also and strengthen being connected of intensity and the assembly that has increased durable and wearability.When making, can adopt supersonic welding to fetch dress system file of plastics.

By A, B, C, D line along blank 270 that be cut to it with intersection line 280, constitute the avris plate.After having done these cut-outs, then in plate, make broken line, upwards bend header board and back plate with broken line 280, by folding along extension line between secant A-C and the B-D respectively, make upwards bending of avris plate, 280 bending avris plate ends 282 along the line then all fold to after as shown in the figure the plate this end, or the end is folded into before the plate, so just formed file.Then, according to the material of blank, these ends quilts adopt bonding force bonding or ultrasonic bonding with glue or bonding agent, are connected on this plate.Figure 27 shows the finished product file of making.If necessary, the angle, garden can be cut in the angle of back plate.

Utilize the same blank of Figure 26, can make the file of another kind of structure, just cut in different ways avris plate end 282.In an alternative embodiment, these ends 282 can be along line 280, from the place that avris switches to respectively and A, B, C, D line intersect of blank 270.In plate, make broken line then, upwards bend preceding plate and back plate along fold line 280, by folding along the extensions of between A-C and B-D, extending respectively, upwards bend the avris plate, the avris plate is connected on the plate by bonding agent or other mode, respectively along A, B, C, D line folded end 282, make it be centered around the outside of avris connector, then according to the material of blank, adhere to bonding or ultrasonic bonding with glue or a kind of bonding agent, these ends 282 are connected to the outer surface of plate, have so just formed file.

In the present embodiment, the avris plate is protected by both ends, and these two ends also are free of attachment in the avris plate.Useful is to make some broken lines corresponding to the broken line 278 of avris plate 274 on the end.If necessary, can the end be affixed in the avris plate with a kind of bonding agent.Because generally the width than the avris plate is big for the height of plate, so this end connects length of a film than avris.In order to remedy this species diversity, the angle that can cut away blank is so that the height of avris plate and this end is identical.

Adopt the identical blank 270 of Figure 26, can also obtain the file of another kind of structure, just excised some avris connector end 282 in different ways.In one of replaceable embodiment, both ends 282 are A and D cut-out along the line, and remaining both ends are cut to and B and the crossing respectively place of C line along the side of line 280 by blank 270.Form file then as follows, in plate, make broken line, press broken line 280 upwards preceding plate of bending and back plate, folding along the line that between A-C and B-D, extends respectively, upwards to bend the avris plate, utilize a kind of bonding agent or other modes, avris plate and first end are connected on the plate, bend remaining end 282 along B and C line respectively, make them be in the outside of avris plate, then according to the material of blank, adopt the method for bonding or ultrasonic bonding with glue or a kind of bonding agent, these remaining ends 282 are pasted on the plate of outer surface.In the present embodiment, all by an end protection, other end then is connected to the outer surface of plate in each avris plate.As mentioned above, can there be certain interval the end of protection avris plate or be connected in the avris plate with respect to this avris plate.If necessary, can cut away two angles of blank, make the height of end of avris plate and this protection equate.

Figure 28 illustrates another embodiment of single type file, and in the present embodiment, the end 286 of plate is owing to cut away a part of size that reduced along the E line.Though only illustrate an angle of blank 290 among Figure 28, it will be understood that each angle of blank can identical mode be handled.This plate end can be the width of standard, promptly is connected to the such double-width for gaining in strength on the plate with the width of plate folding or with above-mentioned working as basically.When adopting overall plastic structure, these ends 286 can be connected to the outside of plate, or are connected to the inboard of plate.When adopting the composite of plastics/laminated paper or paper, should connect plate, make plastics and being connected of plastics obtain best bonding strength.The finished product file of present embodiment as shown in figure 29.

When the file of Figure 29 was made of the quite cheap material such like an elephant paper, the avris plate 220 of Figure 21 also can be adopted the avris plate 274 of strengthening file.This avris plate 220 can be after avris plate 274 connects and be connected on the plate.As mentioned above, the embodiment alternative according to the present invention is described, can extend to visualize other embodiment.

For purpose attractive in appearance, the outside of the plate of the file of alternate embodiments can be enclosed above-mentioned topped or be sticked additional plate among Figure 27 and 29 file and those figure.

The telescopic file of making according to the present invention provides many advantages for the user.When file was filled too many documents, on the top of plate, the various types of reinforcements that are provided with directly over had preferably prevented to tear or other damage.In addition, plate is along the end of side, if suitably all have the width that doubles the plate folding at least in its bottom, be connected to provide with plate is more reliable, this connection can strengthen and prevents to tear or prevent the phenomenon of otherwise separating with plate from plate, the outer surface of the inner panel of preceding plate and back plate also can be strengthened, so that strengthen file in the place that plate connects at least, is preferably in the surf zone reinforcement file of whole plate.

If necessary, can strengthen the bight of plate, to prevent owing to file bottom slips over the fretting wear that file cabinet surface or working surface cause.The key position reinforcement that can also be under pressure, wear and tear or rub or the header board in the coating key position and the outer plate surfaces of back plate in the outer plate surfaces of header board and back plate.

For the structure of the best, all outer surfaces of file is all adorned and is pasted reinforcement to prevent the damage because of moist or other dirts basically.Outer reinforcement so also makes might use cheap coloring agent or colouring agent on paper substrate.Before the interior panel edges of plate and back plate can be enhanced in the connected zone of plate, tear or divide further preventing.All these advantages all help the stability of file and prolong its service life.

The tear resistance of the intensity of telescopic file 10 of the present invention was once done relatively with other commercially available telescopic files, and following test result has shown the superior stability of the telescopic file of the present invention and the intensity that is improved clear and definite and indisputablely.

The pull test of front and back plate

First test shown prevent plate 14 in the past plate 11 or the enhancing of tearing from back plate 12 tear resistance, this characteristic is the characteristic when plate 14 is fully expanded after-drawing file 10.

In this test, the rectangular metal case with a hinged top is put in the expandable folder of different model, and this case is the same wide with the width that file is fully expanded, and and the tie point of plate and front and rear panel between distance isometric.One pulling force chain is connected to the top of chest, and file is stretched out and on the opposite of hinge in this top, and a graduation apparatus is installed on this pulling force chain.

By graduation apparatus the pulling force chain is applied a pulling force, this pulling force has been opened the top of chest, and with header board and the back plate draw back from plate, therefore simulated the overdistension of file, when plate from header board or back plate separately the time, this document folder is thought and is damaged, and measures the required power of this damage that takes place with graduation apparatus.

This result of experiment is listed as follows:

Processing side	Product	Result of the test
			A company	Have conventional 31/2 " paper plate documents pouch	Damage in the time of 9 pounds
A company	Have conventional 31/2 " cloth plate documents pouch	Damage in the time of 8 pounds
			A company	Have newly development 31/2 " TYVEK The plate documents pouch	Damage in the time of 21 pounds

B company	Have conventional 31/2 " paper plate documents pouch	Damage in the time of 12 pounds
			B company	Have conventional 31/2 " TYVEK The plate documents pouch	Damage in the time of 10 pounds
B company	Have reinforcement of the present invention 31/2 " the plate documents pouch	Do not damage in the time of 50 pounds
			B company	Have reinforcement of the present invention 31/2 " the flexible bag of plate	Do not damage in the time of 50 pounds

The bight wear test

The corner wear test has shown the wearability at the angle 22 that has increased file 10.

In this test, various telescopic files are filled 9 pounds paper.One swing arm, is replaced behind per 2500 cycles of this emery cloth with the speed of 654 traverses per hour with respect to the fully loaded files of angles friction of file bottom with 15 degree with a crosus cloth.This document folder is thought and is damaged when the hole occurring on the angle.

Test result is tabulated in following:

Processing side	Product	Result of the test
			A company
	31/2 common " TYVek Plate	Play the hole during 6000 cycles
			A company	31/2 common " cloth plate	Play the hole during 4000 cycles

B company	31/2 common " TYVek Plate	Play the hole during 11000 cycles
			B company
	31/2 " plate of reinforcement of the present invention	Atresia during 17000 cycles〉play the hole during 44,000 cycles

Fall-down test

The load ability to bear and the improved loading features of the increase of this test expression file 10.

Each file is filled 10 pounds paper, and falls from 4 feet height.This document presss from both sides with plate, falls with bight, former plate and later plate.Think then that when splitting or tear this document folder damages.

Test result is tabulated in following:

The mechanical opening test that repeats

This test has shown the service life of file 10.

An arm with two opposed cams of diametric(al) is supported between two leaf springs, and a plate is connected with each spring, this plate and front and back plate contour and and plate and front and rear panel tie point between apart from isometric.

This device is set at dissimilar expandable folder the insides, and the plate of this device and front and back plate are contour.When expandable folder during in its relaxed position, the bottom of this cam lobe leans against on the leaf spring.

Then, the rotating speed that changes with per minute 9.6 rotates this arm, therefore causes cam lobe per minute opening and closing spring 19.2 times.Thereby the spring that passes this device plate opens and loose this expandable folder fully, has so just simulated the use of file.When separating on plate the past plate or the back plate, think that then file damages.

Test result is listed as follows:

The pull test of plate

This test has shown when being parallel to preceding plate or afterwards 11,12 pairs of plates 14 of plate apply pulling force, has increased the resistance that prevents that plate 14 from separating from front or rear panel.

In this test, various types of expandable folders are filled.Then a clip is clipped on the top edge of the fully plate of expansion, and the pulling force chain is connected on the clip by a graduation apparatus.

By this pulling force chain plate is applied the tension force that this plate is drawn back from plate then.Split or when drawing back, thought that this document folder damages from header board or back plate when this plate, this graduation apparatus records the required power of damaging.

The results list of this test is as follows:

The tear test of plate

The tear test of plate has shown the tear resistance that plate 14 is increased.

This test has adopted the method and apparatus that is referred to as ELmenclorf-type formula method to measure the inherent tear resistance of paper.The Elmendorf method is the power of measuring vertical in paper plane, promptly after beginning to tear, needs by the specific power apart from the paper-tear picture sheet.The whole description of this method and apparatus is disclosed in the first phase 1-6 page or leaf (1991) (being TAPPI T414 Test Method, Vol.1, Pages 1-6(1991) of TAPPI T414 method of testing) in, draw at this and to be reference.

Its test result is listed in the table below:

Therefore, above-mentioned test has shown that expandable folder of the present invention is compared with other expandable folders has increased its durability, intensity and tear resistance greatly.When the plate overdistension, or when it is torn or when it fell, file 10 had the anti-damageability of enhancing by header board 11 or back plate 12.And, when plate 14 is pullled, strengthened the ability that it separates from header board 11 or back plate 12, and the tear resistance with enhancing.At last, file 10 ability and the angle 22 that have also increased the infiltration of impedance liquid increased wearability.The expandable folder of the present invention of applicant's design has comprised these characteristics, so will prolong significantly its service life.

Although the present invention has done special diagram and description with reference to most preferred embodiment, those of ordinary skill in the art will be understood that, promptly can be by this making of making the variation of different shape and finishing its details.For example, can be simultaneously strengthen plate with outer and internal layer reinforcement, or after file is made in plate the applied plastic film strengthen.

The present invention is design like this, and promptly reinforcement 20,21, and 24,27,28,29,30 can be used for the expandable folder of other types, i.e. elastic webbing expandable folder, Document folio, suspension type file and leather wallet formula file.In addition, on file 10,, as described in 841, can make single compartment or sack as U.S. Pat 1,698.

According to the clause of patent statute, we have explained principle, optimum structure and the preparation method of our invention, and diagram and described us and thought the content that reflected most preferred embodiment now.Yet be appreciated that except special diagram and description, can in the scope of appended claim, implement the present invention.

Claims (49)

1, a kind of telescopic file has:

Plate before one, this plate have first and second surfaces, relative two avris and a bottom;

One back plate, this plate has first and second surfaces, relative two avris and a bottom;

One plate, this plate have a top, a bottom, relative two avris and be used for being connected before and after two bights of plate peripheral part, therefore the first surface of two plates facial mutually relatively and the inner boundary of the front and back of configuration file folder, the bottom of the bottom of plate and plate before and after two relative avris are linked respectively and before and after at least the part of plate avris be connected;

It is characterized in that plate has a sheet plate that the folding of many Zhe shapes is arranged, the folding at the two ends of this sheet plate is wideer than other folding, and the two ends folding be connected to before on plate and the back plate, thereby strengthen therebetween connection.

2, a kind of telescopic file has:

Plate before one, this plate has first and second surfaces;

One back plate, this plate has first and second surfaces;

One plate, it links up the peripheral part of front and back plate, so that the face of the first surface of two plates is mutually relatively with inner boundary before and after configuration file presss from both sides respectively; And having an interior reinforcement, before and after it is connected on the first surface of plate adjacent at least a portion connecting portion that is connected between plate and the plate peripheral part, the front and back plate separates with plate when preventing to use file.

3, telescopic file as claimed in claim 1 or 2 is characterized in that, plate comprises the reinforcement that extends along at least one plate top, the tear resistance of plate when using file to increase.

4, telescopic file as claimed in claim 1 or 2 is characterized in that, it also has the reinforcement that is used for the plate bight, this reinforcement along that part of extension of the bottom of plate and side to strengthen the wearability of file.

5, telescopic file as claimed in claim 1 or 2, it is characterized in that, each header board all has relative two sides and a bottom with the back plate, wherein, the plate member has top, bottom and relative two sides, the bottom of plate was connected with the part of plate avris before and after at least before and after the bottom side of plate was connected respectively to, and reinforcement partly extends at the avris of the front and back, first surface upper edge of front and back plate plate.

6, telescopic file as claimed in claim 1 or 2 is characterized in that, plate also has an inner surface and outer surface, and it also comprises the reinforcement that pastes the plate outer surface, to strengthen the wearability of file.

7, telescopic file as claimed in claim 1 or 2 is characterized in that, the coating before and after it also is included on the second surface of plate is not subjected to disfigurement with performance and the protected file folder of promoting the infiltration of file impedance liquid.

8, telescopic file as claimed in claim 7 is characterized in that, this coating comprises a kind of acryhic material of styreneization.

9, a kind of telescopic file has:

A preceding plate, this preceding plate have an outer surface and an inner surface;

Plate after one, this back plate have an outer surface and an inner surface;

A telescopic plate, it comprises bottom and avris plate, it links together the peripheral part of front and back plate, so that the inner surface of plate is faced mutually;

The part of reinforcement material, this reinforcement material each the avris plate by file is before and after being connected to then on the position of plate, to strengthen the durability that is connected and increases file of each avris plate and plate.

10, telescopic file as claimed in claim 9 is characterized in that, plate comprises that one has the sheet material of many Zhe shapes folding and the end wideer than other foldings.

11, telescopic file as claimed in claim 9 is characterized in that, plate comprises a top, and wherein reinforcement material is the top that is attached to its avris plate with the form of band.

As the telescopic file of claim 11, it is characterized in that 12, reinforcement material is adhered on the outer surface of the outer surface of avris plate and file plate.

As the telescopic file of claim 12, it is characterized in that 13, reinforcement material adopts the form of band, this band strides across the outer surface of avris plate and plate, thereby identical with the neighboring of whole file fully.

14, as the telescopic file of claim 12, it is characterized in that reinforcement material topped each avris plate fully.

As the telescopic file of claim 11, it is characterized in that 15, reinforcement material is adhered to the inner surface of avris plate and is connected at least a portion of plate inner surface.

As the telescopic file of claim 15, it is characterized in that 16, reinforcement material adopts the form of band, this band is by the inner surface of avris plate and plate, thereby the inner rim of complete and whole file coincide.

17, as the telescopic file of claim 15, it is characterized in that reinforcement material topped each avris plate fully.

18, telescopic file as claimed in claim 9, it is characterized in that, the avris plate comprises a top, and reinforcement material forms by strengthening band, this band and to be positioned at the top of avris plate of each junction of avris plate and front and back plate adjacent.

19, as the telescopic file of claim 18, it is characterized in that, reinforcement material includes first and strengthens band, this band is adhered on each skin of header board, the interior layer of plate before it extends to above the top of adjacent avris plate with being an angle is strengthened band exceeds the plate that links to each other therewith by preceding plate end width; Reinforcement material comprises that also one second is strengthened band, this second band is adhered on each skin of back plate, it is angle ground extending above the top of adjacent avris plate and being adhered on the internal layer of back plate, exceeds the end width of the plate that links to each other therewith and strengthen band by the back plate.

20, as the telescopic file of claim 19, it is characterized in that, strengthen band and above the avris plate, extend with the angle of 30 to 60 degree.

As the telescopic file of claim 19, it is characterized in that 21, reinforcement material comprises the composite of a kind of thermoplastic film or a kind of thermoplastic film/paper.

22, telescopic file as claimed in claim 9, it is characterized in that, in the top of avris plate with on the plate of front and back, adopt reinforcement, so that when using file, prevent that the top of avris plate from tearing or preventing that the avris plate from separating from the front and back plate.

As the telescopic file of claim 22, it is characterized in that 23, reinforcement is to form like this: the reinforcement that the top of each avris plate has been formed a double layer material to himself reflexed.

As the telescopic file of claim 23, it is characterized in that 24, each is securely adhered in the avris plate with bonding agent by the top of reflexed.

As the telescopic file of claim 22, it is characterized in that 25, reinforcement comprises a banded reinforcement material, this band is on a position that extends to its each avris on the top of each avris plate.

26, as the telescopic file of claim 22, it is characterized in that, each avris plate comprises the composite of one thermoplastic film/paper, and reinforcement is to form like this, the top that is about to each avris plate to himself reflexed to form the reinforcement of four layers of composite.

Each of both ends as the telescopic file of claim 23, it is characterized in that 27, the end and the reinforcement material of each avris plate do not interconnect, so that can be connected on the different plate surface at each end of avris plate.

As the telescopic file of claim 23, it is characterized in that 28, the end and the reinforcement of each avris plate do not interconnect, so that can be connected on the different plate surface in each of three ends of each end of avris plate.

As the telescopic file of claim 23, it is characterized in that 29, the end and the reinforcement of each avris plate do not interconnect, so that can be connected on the different plate surface in each of four ends of each end of avris plate.

30, a kind of telescopic file, it has:

A preceding plate, this header board has inside and outside surface;

Plate after one, this back plate has inside and outside surface;

A telescopic plate, it is used for the peripheral part of preceding plate and back plate is linked together, so that the inner surface of plate is faced mutually; And

Before and after reinforcement, this reinforcement are connected on the peripheral part of plate, and plate is connected on the reinforcement, to strengthen the tear resistance that is connected between plate and the plate.

As the telescopic file of claim 30, it is characterized in that 31, reinforcement comprises the reinforcement material of a band shape, this reinforcement material is connected on the part of front and back plate outer surface avris.

32, as the telescopic file of claim 31, it is characterized in that, plate comprises a sheet material, this sheet material has folding of many Zhe shapes and the end wide than other foldings, and banded reinforcement material is the same wide with the width of plate end at least, and reinforcement is included in the bar shaped reinforcement material on each plate, and it is extending from the bottom to the top position of plate tie point.

As the telescopic file of claim 31, it is characterized in that 33, reinforcement comprises the flaky reinforced material of the whole outer surface of topped basically each plate.

34, as the telescopic file of claim 30, it is characterized in that, back plate has the high height of more preceding plate, reinforcement material comprises the composite of a kind of thermoplastic film or a kind of thermoplastic film/paper, and the avris plate comprises bottom contact pin and a bottom, is used for being connected to the bottom plate.

As the telescopic file of claim 30, it is characterized in that 35, plate constitutes a bottom plate, and preceding plate, bottom plate and back plate are whole and are made of single blank material.

36, as the telescopic file of claim 35, it is characterized in that, also comprise the avris plate of the formation file of plate before and after being used for being connected to.

As the telescopic file of claim 36, it is characterized in that 37, the composite of each free a kind of thermoplastic film of single blank material and avris plate or a kind of thermoplastic film/paper constitutes.

As the telescopic file of claim 36, it is characterized in that 38, reinforcement is plate plate after the bottom plate extends in the past.

39, a kind of telescopic file, it comprises:

A preceding plate, this preceding plate has inside and outside surface;

Plate after one, this back plate has inside and outside surface;

A telescopic plate, this plate comprise bottom plate and avris plate, and they are used for the peripheral part of front and back plate is linked together, so that the inner surface of plate is faced mutually; And

End, this end are used to be connected to one of plate or avris plate, to strengthen the service life that is connected and increases this document folder of each avris brace and plate.

40, as the telescopic file of claim 39, it is characterized in that, preceding plate, bottom plate, avris plate, back plate and end all be one and constitute by single blank material.

As the telescopic file of claim 40, it is characterized in that 41, the end is extended by the avris plate and is connected on the plate.

As the telescopic file of claim 40, it is characterized in that 42, the adjacent avris plate that the end is stretched out by plate and process is used for connecting is to another plate.

43, as the telescopic file of claim 40, it is characterized in that, four ends are arranged, and wherein two are stretched out and are connected on the plate from the avris plate, and wherein two from a plate stretch out and by an adjacent avris plate being used for connecting to another plate.

As the telescopic file of claim 40, it is characterized in that 44, back plate has the height higher than preceding plate, and the material of single blank comprises the composite of a kind of thermoplastic film or a kind of thermoplastic film/paper.

45, as the telescopic file of claim 40, it is characterized in that, on the outer surface of half front and back plate height, use reinforcement at least and under it, connect plate, be connected to tear resistance on the plate to increase plate.

46, as the telescopic file of claim 45, it is characterized in that, reinforcement comprise a slice topped basically the reinforcement material of each plate whole outer surface.

As the telescopic file of claim 46, it is characterized in that 47, plate comprises a sheet material with the folding of many Zhe shapes, and the end folding of this sheet material is wide than other foldings.

As the telescopic file of claim 46, it is characterized in that 48, it also comprises an additional plate, this additional plate is attached on each reinforcement of plate outer surface, safeguards the connection of plate between this.

49, as the telescopic file of claim 48, it is characterized in that, preceding plate and additional plate are made by red leather wallet material, back plate is made by Manila paper, the paper that plate is strengthened by plastic sheeting is made, reinforcement comprises the composite of a kind of thermoplastic film or a kind of thermoplastic film/paper, and the back plate has than the high height of preceding plate and the top of visible back plate.

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