TW201609498A - Improvements in and relating to packaging and machines therefor - Google Patents

Abstract

A single face paperboard which includes a plurality of creases thereon to facilitate the wrapping of objects, and apparatus and methods for making same.

Description

On packaging and its machines or related improvements

The present invention is directed to improvements in packaging and its machines or related thereto. In particular, it relates to protective package type packages made from paper products and to machines and methods for the manufacture of protective package type packages.

As the volume of goods shipped around the world increases, the demand for protective packaging is considerable.

Expanded polystyrene (EPS) is a common form of protective packaging used. EPS is extremely light, absorbs shock and is relatively inexpensive to produce. These properties are all desirable qualities of protective packaging.

However, EPS (and other similar materials) have problems associated with it.

First, most of the foams and polymers used in packaging are often not environmentally friendly. Its manufacture requires the use of undesirable chemicals.

Moreover, such materials can be difficult to handle because they are generally not biodegradable and produce undesirable fumes when burned.

Another problem with EPS and plastic materials is that they are largely non-flexible. This means that in order to be effective for irregularly shaped products, the polystyrene must be molded to accommodate the particular shape of the product. The requirement to produce a customized mold can be expensive and time consuming.

However, non-flexible packages are suitable for use in products of regular shape. Therefore, panels made of foam, corrugated cardboard, plastic or pulp can be used to form cardboard boxes and other containers.

Corrugated paperboard is more eco-friendly than polystyrene and plastic materials when used in protective packaging. However, since this corrugated board is substantially rigid (due to the grooves formed by the corrugated sheet material), it can only be used for regular shaped products or in combination with molded inserts (such as having the inherent problems discussed previously). Polystyrene) used.

Therefore, corrugated sheets are also unsuitable for use in irregularly shaped products due to their rigidity.

One material suitable for use in irregularly shaped articles is a bubble cloth. The bubble cloth is made of a plastic material and has several problems previously identified. However, it can be easily formed around the object. Unfortunately, the bubble cloth does not have the impact resistance of a relatively strong material such as corrugated board and polystyrene foam. In addition, the bubble cloth is liable to tear on sharp objects.

Accordingly, it would be desirable to provide packaging materials that are more eco-friendly than plastic bubble cloths and that are sufficiently flexible or bendable to effectively wrap irregular items, are strong, lightweight, and relatively inexpensive to produce. Ideally, the manufacturing cost should not be too different from the manufacturing cost of the bubble cloth.

Previously, applicants have addressed some of these issues in WO 2011/059347. However, while this is a satisfactory solution, it would be useful if there were alternative solutions that could be manufactured cheaper and simpler.

Elongate articles of indeterminate length of more than about 3 meters require a simpler and more efficient wrapping of single-sided paperboard in the art. For example, in the case where the single-sided paperboard is not cut and wrapped in two or more discrete sections, aluminum tubes or aluminum extrusions longer than 2 meters cannot be evenly wrapped by the single-sided paperboard.

Previously, Applicants have conceived that merely spiraling an elongate article with a single side around more than 3 meters in length can be a way of wrapping the elongated article. However, it has subsequently been found that spiraling the length of the single-sided cardboard around the length of the article is problematic due to the application of the groove along the axis of the groove. One-sided rigidity; this leads to wrinkles.

It is an object of the present invention to address the aforementioned problems or at least to provide the public with a useful choice.

All references, including any patents or patent applications cited in this specification, are hereby incorporated by reference. No reference to any of the references constitutes prior art. The discussion of the references states what the authors claim, and the applicants reserve the right to challenge the accuracy and pertinence of the documents cited. It will be clearly understood that although several prior art publications are referred to herein, this reference in New Zealand or in any other country does not constitute a general knowledge of any of these documents. Partial recognition.

Unless the content context clearly requires otherwise, the words "comprise", "comprising" and the like will be interpreted as meaning (as opposed to exclusion or exhaustiveness) throughout the description and scope of the patent application. That is, it is explained in the sense of "including but not limited to".

Other aspects and advantages of the invention will be apparent from the description and appended claims.

The present invention is generally directed to single-sided paperboard suitable for use in protective packaging that can be an item of indeterminate length. The package can be along any of the longitudinal and/or transverse axes of the laminate due to a series of intersecting creases formed over the single-sided paperboard that enable the laminate to bend/fold across the longitudinal axis of the web. Both wrap objects of irregular shape.

According to a first aspect of the present invention, there is provided an apparatus for making a single-sided paperboard, the apparatus comprising: - a single overlay unit that is already downstream; - a first roller comprising a plurality of spaced apart locations positioned around a plurality of spaced apart knives having a circumferential axis substantially orthogonal to a rotational axis of the first roller; - at least one other roller comprising: a) a plurality of spaced apart circumferential tracks, the plurality of spaced apart circumferential tracks having their circumferential axis and the axis of rotation of the second roller at an angle of substantially 20 to 70 degrees toward their LHS; and/or b) plural a spaced apart circumferential track, the plurality of spaced apart circumferential tracks having the circumferential axis and the axis of rotation of the second roller at an angle of substantially 20 to 70 degrees toward its RHS; wherein the rollers all associate the associated rolls Positioned on the other side of the side of the single-sided paperboard relative to the first, second, and third rolls; wherein the rolls all have their respective take-up rolls/circumferential tracks positioned to be on the single side When the paperboard passes through the rolls, the groove of the single-sided cardboard is folded.

According to a second aspect of the present invention, there is provided a single-sided paperboard comprising: - a plurality of laterally spaced apart creases intersecting orthogonally to a longitudinal axis of each of the grooves; - a plurality of lateral intervals An open crease that intersects the longitudinal axis of each of the grooves at an angle of substantially 20 to 70 degrees toward its RHS; - a plurality of laterally spaced creases to face the LHS thereof An angle of substantially 20 to 70 degrees intersects the longitudinal axis of each of the grooves.

According to a third aspect of the present invention, there is provided a single-sided paperboard comprising: - a plurality of laterally spaced apart creases intersecting substantially orthogonally to a longitudinal axis of each of the grooves; The distance Y separating each crease from the adjacent crease is calculated as follows: Y = groove height x 5.

According to a fourth aspect of the present invention, there is provided an apparatus for making a single-sided paperboard, the apparatus comprising: - a single overlay unit that is already downstream; - a first roller comprising a plurality of laterally spaced apart circumferences a plurality of laterally spaced circumferential crease cutters having a circumferential axis substantially orthogonal to the rotation of the first roller a shaft; wherein the first roller positions an associated roll on the other side of the single-sided paperboard relative to the side of the first roll; wherein, in use, the cresing cutter presses the crease tip to the In a single-sided paperboard, the grooves are folded in a direction substantially perpendicular to the grooves when the single-sided paper is passed through the roll; and wherein each of the crease tips is separated from the adjacent crease tips by the following formula The distance Y: Y = groove height × 5.

According to a fifth aspect of the present invention, there is provided a single-sided paperboard comprising: - a plurality of laterally spaced apart creases intersecting substantially orthogonally to a longitudinal axis of each of the grooves; - a plurality of a laterally spaced crease that intersects the longitudinal axis of each of the grooves at an angle of substantially 20 to 70 degrees toward its RHS; - a plurality of laterally spaced creases oriented toward The angle at which the LHS is substantially 20 degrees to 70 degrees intersects the longitudinal axis of each of the grooves; wherein the distance separating each crease from the adjacent parallel crease is calculated by the following formula: Y = groove The height of the pattern is ×12.5.

According to a sixth aspect of the present invention, there is provided an apparatus for making a single-sided paperboard, the apparatus comprising: - a single overlay unit that is already downstream; - a first roller comprising a plurality of laterally spaced apart folds a plurality of laterally spaced folding knives having a circumferential axis substantially orthogonal to a rotational axis of the first roller; at least one other roller comprising: - a plurality of spaced circumferential tracks, a plurality of spaced circumferential tracks such that the circumferential axis and the axis of rotation of the second roller are at an angle of substantially 20 to 70 degrees toward their LHS; and / Or a third roller comprising a plurality of spaced apart circumferential tracks, the plurality of spaced circumferential tracks having an axis of the circumference and the axis of rotation of the second roller being substantially 20 to 70 degrees toward the RHS thereof Wherein the rollers all position the associated rolls on the other side of the single-sided paperboard relative to the side of the first roll; wherein the first, second and third rolls are calculated by the following formula The distance separating each track from the adjacent track Y: Y = groove height × 12.5.

According to a seventh aspect of the present invention, there is provided a roll for folding a single-sided paperboard, wherein the outer surface of the roll comprises: - at least one circumferential track protruding therefrom, and/or - a plurality of folding cutter discs The track/folding cutter has a fold-out tip formed on the left and right sides of the outwardly inclined side when viewed in cross section and a top section connecting the left side and the right side, wherein the top section has a substantially 2 mm to A length of 3 mm and wherein the height of the folding tip is substantially equal to the height of the groove on the one side to be folded.

In a preferred embodiment, the circumferential track is substantially helical.

According to an eighth aspect of the present invention, there is provided a single-sided paperboard comprising: - a plurality of laterally spaced apart creases intersecting orthogonally to a longitudinal axis of each of the grooves; - wherein The substantially 100 mm inner crease of the at least one outer edge of the face is separated from each other by a distance Z from at least half of the distance Y from which the other creases are separated from each other.

According to a ninth aspect of the present invention, there is provided a method of making a single-sided paperboard, the method comprising the steps of: a) forming a plurality of transverse lines substantially orthogonal to a longitudinal axis of each of the grooves. To the spaced apart creases; wherein the distance Y separating each crease from the adjacent parallel crease is calculated by the following formula: Y = groove height x 12.5.

According to a tenth aspect of the present invention, there is provided a method of making a single-sided paperboard substantially as hereinbefore described, the method comprising the additional step of: b) forming an angle and a groove substantially 20 to 70 degrees toward its RHS a plurality of laterally spaced creases intersecting the longitudinal axes of each of the ridges; c) forming the longitudinal axis at an angle of substantially 20 to 70 degrees toward the LHS and each of the grooves A plurality of laterally spaced creases intersecting.

According to an eleventh aspect of the present invention, there is provided a method of making a single-sided paperboard, the method comprising the steps of: a) forming a longitudinal axis of each of the grooves relative to substantially 20 to 70 degrees The plurality of laterally spaced creases intersecting the longitudinal axis of each groove.

According to a twelfth aspect of the present invention, there is provided a single-sided paperboard comprising: - a lining sheet joined to a fluted sheet, wherein the lining sheet extends over at least one side edge beyond the fluted sheet An edge; and - a plurality of laterally spaced apart creases that intersect substantially orthogonally to the longitudinal axis of each of the grooves.

Preferably, the lining sheet extends a distance of at least substantially 100 mm from the edge of the fluted core paper.

According to a thirteenth aspect of the present invention, there is provided a single-sided paperboard comprising a lining sheet substantially as hereinbefore described, wherein the creases are separated from each other by a distance Z within substantially 100 mm of each outer edge of the fluted sheet. At least half of the distance Y from which the other creases of the Z system are separated from each other.

According to a fourteenth aspect of the present invention, a method of manufacturing a single-sided paperboard is provided, The method is characterized by the step of forming a series of creases that intersect the longitudinal axis of the grooves on the single-sided paperboard.

In accordance with a fifteenth aspect of the present invention, a single-sided paperboard is provided that includes a series of creases along its length that intersect the longitudinal axis of the groove to achieve a fold or bend across the axis.

In accordance with a sixteenth aspect of the present invention, a single-sided paperboard is provided that includes a plurality of laterally spaced apart creases that intersect substantially orthogonally with a longitudinal axis of each of the grooves.

According to a seventeenth aspect of the present invention, there is provided a single-sided paperboard comprising a plurality of laterally spaced apart angles intersecting a longitudinal axis of each of the grooves at an angle of substantially 20 to 70 degrees Creases.

According to an eighteenth aspect of the present invention, there is provided a single-sided paperboard comprising: - a plurality of laterally spaced apart creases intersecting substantially orthogonally to a longitudinal axis of each of the grooves ;- a plurality of laterally spaced creases intersecting the longitudinal axis of each of the grooves with a non-orthogonal angle toward their RHS; - a plurality of laterally spaced creases oriented toward The non-orthogonal angle of the LHS intersects the longitudinal axis of each of the grooves.

1‧‧‧Single-sided cardboard

2‧‧‧ longitudinal crease

3‧‧‧ grooves

4‧‧‧ crease

5‧‧‧ crease

100‧‧‧ Equipment

101‧‧‧Single veneer unit

102‧‧‧Single-sided cardboard/cardboard

102'‧‧‧One-sided folded cardboard

102"‧‧‧ double folded cardboard

103‧‧‧First roll

104‧‧‧Circular orbit

105‧‧‧roll

106‧‧‧ Track

107‧‧‧Roll/third roller

108‧‧‧ Track

200‧‧‧Modified single-sided cardboard/folding rolls

201‧‧‧ Track

300‧‧‧ single side

300'‧‧‧ single-sided cardboard

301‧‧‧ Groove sheet

302‧‧‧ lining sheets

303‧‧‧ crease

304‧‧‧Base section

305‧‧‧ left wall

306‧‧‧ right wall

310‧‧‧Component symbol

400‧‧‧one side

402‧‧‧ longitudinal crease

403‧‧‧ crease

404‧‧‧ crease

500‧‧‧Roll assembly/roller

501‧‧‧ folding roll

502‧‧‧ rolls

503‧‧‧Folding cutter

504L‧‧‧ left wall

504R‧‧‧ right wall

505‧‧‧flat top section

510‧‧‧Edge crease cutter

550‧‧‧ crease tip

700‧‧‧Single-sided cardboard

701‧‧‧ crease

702‧‧‧ groove

800‧‧‧Single-sided cardboard

801‧‧‧ longitudinal crease

802‧‧‧ groove

803‧‧‧ edge

804‧‧‧Flat edge section/flat section

900‧‧‧Single-sided cardboard

901‧‧‧ diagonal crease

902‧‧‧ groove

1000‧‧‧Single-sided cardboard

1001‧‧‧ longitudinal crease

1002‧‧‧ grooves

1040‧‧‧ longitudinal crease

1050‧‧‧LHS crease

1080‧‧‧RHS angled crease

1100‧‧‧Single-sided cardboard

1101‧‧‧Vertical crease/single-sided cardboard

1102‧‧‧ grooves

1103‧‧‧ longitudinal crease

A‧‧‧ a pair of tracks

B‧‧‧A pair of tracks

C‧‧‧A pair of tracks

D‧‧‧ a pair of tracks

R‧‧‧ arrow

Y‧‧‧ distance

Z‧‧‧ distance

Other aspects of the invention will be apparent from the following description, taken in conjunction with the accompanying drawings in which FIG. Figure 2 shows a close-up view of the corner section of the single-sided cardboard of Figure 1 along with an end view of the corner section; Figure 3 is a side elevational view of the section of the single-sided paperboard of Figure 2 in a flexed state along an axis; Figure 4 shows an illustrative apparatus for making a single-sided paperboard in accordance with a preferred embodiment of the present invention. a plan view; and Figure 5 shows a perspective view of an alternative roll of the replaceable rolls 105 and 107 for use in the apparatus for making single-sided paperboard as shown in Figure 4; Figure 6a shows a conventional "non-crease" list A schematic transverse cross-sectional view of a faceboard; FIG. 6b shows a schematic transverse cross-sectional view of a preferred embodiment of a single-sided paperboard in accordance with an aspect of the present invention, wherein the one-sided groove is separated by a distance Y Series of orthogonal crease intersections; Figure 7 shows a schematic plan view of a preferred embodiment of a single-sided paperboard in accordance with yet another aspect of the present invention, wherein the grooves are 45 degrees by spaced longitudinal creases and RHS and LHS The creases separating the corners intersect, and all the parallel creases are separated by a distance Y; Figure 8 shows a side view of a roller assembly for making a single-sided cardboard suitable for longitudinally wrapping an elongated article; Figure 9 shows a crease cutter for use on a take-up roll as shown in Figure 8; Figure 10 shows an enlarged view of the crease tip of the crease cutter shown in Figure 9; Figure 11 shows an enlarged view of the right hand end of the crease roller of Figure 8.

Figure 12 shows a schematic plan view of a single-sided paperboard made by the folding roll of Figure 8, having a longitudinal crease and having an additional crease to facilitate wrapping an edge of the elongated article; Figure 13 shows A schematic plan view of a single-sided paperboard extending beyond the lining of the edge of the fluted sheet; Figure 14 shows a parallel angled crease that allows the embodiment of the single sided to spirally wrap the elongated article between A schematic plane having a single-sided cardboard comprising an edge extending beyond the edge of the groove to promote wrapping of the lining sheet of the elongated article Figure 15 shows a schematic plan view of a single-sided paperboard having parallel creases orthogonal to the longitudinal axis of the groove in accordance with another aspect of the present invention; and Figure 16 shows the incorporation of Figures 12 and 13 A schematic plan view of a single view of a single-sided cardboard with creases and edge elements.

With respect to Figures 1 to 3, a single-sided paperboard 1 is provided which is formed to have: - a plurality of spaced apart longitudinal folds 2 which intersect orthogonally to the longitudinal axis of the groove 3; - a plurality of spaced apart folds Trace 4, which intersects the longitudinal axis of the groove 3 at an angle of substantially 45 degrees toward its RHS; - a plurality of spaced apart creases 5 at an angle of substantially 45 degrees toward its LHS and each of the grooves The longitudinal axes of one intersect.

In Fig. 4, an apparatus 100 for forming a single sided paperboard in accordance with an aspect of the present invention is shown.

Apparatus 100 has a single veneer unit 101 that produces a single-sided paperboard 102 in the direction indicated by arrow R. Preferably, the single veneer unit 101 produces a single-sided paperboard via a cold process.

It will be appreciated that in certain embodiments, this intermediate form of paperboard 102 in device 100 can be the final product and rolls 105 and 107 will not be needed.

The single-sided paperboard 102 passes between the first roll 103 and the associated roll (not shown) shortly after exiting the single veneer unit 101. The first roll 103 has a plurality of circumferential tracks 104 thereon that, in use, fold the grooves of the single-sided paperboard to form longitudinal folds 1040 therein (as depicted in Figure 4). This intermediate form of the folded paperboard is indicated by the element symbol 102' and will now be referred to simply as a longitudinally folded single-sided paperboard.

The single-sided folded paperboard 102' is now passed between the second roll 105 and the associated roll (not shown). The second roller 105 has a plurality of tracks 106 thereon, and a plurality of tracks 106 have their circumferences The axis of rotation of the shaft and the second roller is at an angle of substantially 45 degrees toward the LHS. The final intermediate form of the folded cardboard is indicated by the symbol 102" and will now be referred to simply as a double folded cardboard. The roller 105 forms an LHS crease 1050.

The double-folded paperboard 102" is now passed between a third roll 107 and an associated roll (not shown). The third roll 107 has a plurality of tracks 108 thereon, the plurality of tracks 108 having their circumferential axis oriented with the axis of rotation The RHS is substantially at an angle of 45. The resulting triple-folded form of paperboard is the final product of the apparatus 100 and forms one form of the modified single-sided paperboard 200 of the present invention. The roller 107 forms an RHS angled crease 1080.

With respect to Figure 5, a take-up roll 200 having four pairs (A to D) of track 201 thereon is shown, each pair of tracks being in the form of a double helix. In each pair, one track has a clockwise spiral and the other of the double helix has a counterclockwise helix. In Fig. 6a, a partial end view of a conventional "non-crease" sheet of single-sided 300 having a fluted sheet 301 and a lining sheet 302 is shown. The ridge of the groove is indicated by the line indicated by the symbol 310. With respect to Figure 6b, a single-sided paperboard 300' of Figure 6a after having been folded in accordance with the present invention is shown. As can be seen, the crease 303 extending across the groove has a base section 304 that connects the left and right walls 305 and 306 that are inclined outward. The angle at which the crease 303 intersects the longitudinal axis of the groove is 90 degrees. The grooved sheet 301 has a crease 303 spaced apart by a distance Y. The distance Y is calculated by multiplying the height of the groove of 4 mm by 5 to obtain a distance of 20 mm from which the adjacent creases are separated from each other.

With respect to Figure 7, a single-sided 400 sheet is shown in which the grooved sheet 401 is at the top and the liner sheet is not visible. The fluted sheet 401 has: - a plurality of spaced apart longitudinal creases 402 - orthogonally intersecting the axis of the groove 410 - and all of which are separated from each other by a distance Y; - a plurality of spaced apart creases 403 towards The RHS has an angle of substantially 45 degrees that intersects the longitudinal axis of the groove and is all separated from each other by a distance Y; - a plurality of spaced apart creases 404 that are at an angle of substantially 45 degrees toward the LHS and each of the grooves The longitudinal axes of the intersections intersect and are all separated from each other by a distance Y.

The distance Y is calculated by multiplying the height of the groove of 4 mm by 12.5 to obtain a distance of 50 mm from which the adjacent creases are separated from each other.

With respect to Figure 8, a roll assembly 500 having a take-up roll 501 and a roll 502 is shown. 9 and 10 show the shape of the crease cutter 503 forming the take-up roll 501 in more detail. The crease cutter 503 has a crease tip 550 formed from an outwardly sloped left wall 504L and an outwardly sloped right wall 504R joined by a substantially 3 mm wide flat top section 505 forming a crease tip. As shown in Figures 8 and 11, the roller 500 has an interval between each crease tip determined by a distance Y (according to the formula discussed with respect to Figure 6). The exception is that the rightmost group of edge crease cutters 510 is separated by a distance Z from one-half of the distance Y. The distance Y is calculated by multiplying the height of the groove of 4 mm by 5 to obtain a distance of 20 mm from which the adjacent creases are separated from each other.

The roller assembly 500 produces a single sided paperboard 700 in use, the single sided paperboard 700 having creases 701 spaced apart by a distance Y or spaced apart by a distance Z from the left edge, as shown in FIG. The crease 701 intersects the longitudinal axis of the groove 702 at 90 degrees. The shorter distance Z impairs the groove integrity to facilitate easier folding of the paperboard to initially wrap the paperboard over the elongated article. The distance Y is calculated by multiplying the groove height of 2.5 mm by 5, and the distance of 12.5 mm from which the adjacent creases are separated from each other is obtained.

In FIG. 13, a single-sided paperboard 800 having longitudinal folds 801 that intersect orthogonally to the longitudinal axis of the grooves 802 is shown. In addition, the single-sided paperboard 800 also has a backing sheet that extends beyond the edge 803 of the stencil sheet to which it is joined to form a flat edge section 804. The flat section 804 provided by the over extended lining sheet promotes easier folding of the paperboard to initially wrap the paperboard over the elongated article. The distance Y is calculated by multiplying the height of the groove of 5 mm by 5, and the distance of 25 mm from which the adjacent creases are separated from each other is obtained.

In Fig. 14, a single-sided paperboard 900 having a diagonal crease 901 that intersects the groove 902 and allows one side of the form to be helically wound around the elongate article is shown. The distance Y is calculated by multiplying the height of the groove of 4 mm by 5, and the distance of 20 mm from which the adjacent creases are separated from each other is obtained.

In Fig. 15, a single-sided paperboard 1000 having orthogonal creases 1001 that intersect orthogonally with the grooves 1002 and that allows one side of the form to wrap around the elongate article along the longitudinal axis of the single-sided paperboard is shown. The longitudinal folds 1001 are separated from each other by a distance Y. The distance Y is calculated by multiplying the height of the groove of 3.5 mm by 5, and the distance of 17.5 mm from which the adjacent creases are separated from each other is obtained.

In Fig. 16, a single sided paperboard 1100 having a first set of spaced apart longitudinal creases 1101 that intersect orthogonally with the grooves 1102 and are separated from each other by a distance Y is shown. The single-sided paperboard 1101 also has a second set of spaced apart longitudinal folds 1103 that intersect orthogonally with the grooves 1102 and are separated from each other by a distance Z. One hundred and a half distance from the Z system. The distance Y is calculated by multiplying the height of the groove of 2.2 mm by 5, and the distance of 11 mm from which the adjacent creases are separated from each other is obtained.

Alternative means of practicing the invention

Cardboard can occur in a variety of different forms without limiting the scope of the invention.

The angle of the crease across the longitudinal axis of the groove may be substantially orthogonal or substantially between 20 and 70 degrees.

In a preferred embodiment, the non-orthogonal angled creases may have an angle substantially between 40 and 50 degrees with respect to the longitudinal axis of the grooves.

Most preferably, the non-orthogonal angled creases may have an angle of substantially 45 degrees with respect to the longitudinal axis of the grooves.

In one embodiment in which a single face can be helically moved about the elongated article, there is a series of parallel spaced apart creases having an angle of substantially 30 to 45 degrees with respect to the longitudinal axis of the groove.

Creases can be formed in a variety of different ways without departing from the scope of the invention.

Thus, it will be appreciated that the crease can be formed by any suitable method that spans the grooved press line of the single-sided paperboard as part of a continuous process.

In one embodiment, the creases may be formed by a rotating cutter that all have a common axis of rotation to collectively form a series of aligned but spaced apart rolls.

In another preferred embodiment, the LHS and RHS angled creases can be formed by rollers having two spiral intersecting tracks thereon.

In some of the reversals of the present invention, there may be three sets of rolls that are employed to fold a single side.

The creases allow the board to flex or flex against the longitudinal axis of the grooves.

The number of creases and/or the spacing between the creases determines the amount of bending of the paperboard along the axis along which the grooves extend. Thus, if the grooves extend generally transversely relative to the longitudinal axis of the single-sided paperboard, the creases enable the paperboard to flex around the longitudinal axis of the paperboard.

The number of creases depends on the degree to which one wants to impart flexibility to the single-sided paperboard. The more creases there are, the more effective bending can be introduced into the board.

During the creation of a single face, the axis of the groove extends transversely relative to the plate along its direction which produces a continuous length.

In forming the present invention, there are two conflicting objectives to consider when considering the number and spacing of creases: - first, having a sufficient number of creases to form a fold that can be folded around multiple axes to closely conform to the surface of the article Shaped single-sided cardboard; and - Second, while attempting to achieve the above objectives, without excessive creases, the structural integrity of the grooves (and therefore the protective ability) is compromised by its excessive planarization.

An exception to the second objective occurs when an embodiment is desired that has a single side suitable for wrapping fine objects. In this case, in order to enable the edge of the single face to begin to wrap around ( eg , fold or wrap) a fine article that may have a width less than the distance Y: at least 100 mm from the edge of at least one edge of the single face The creases in the area may be more closely spaced than the distance Y, and Y additionally controls the spacing of the creases in the central area (ie, the non-edge areas).

Otherwise the single side will not fold efficiently along its length and will hinder the folding, making it a problem to capture the elongated object within the fold. Increase folding ability along the edge (Package ability) promotes the wrapping of such items even at the expense of groove integrity, and once the article is completely wrapped, the integrity of the maintained non-edge groove still functions to protect the article.

The inventors have also discovered that the contour of the crease can also promote bending.

The inventors have found that the optimum crease shape is in the form of a channel having an outwardly flared wall on either side of the base section.

In an illustrative example, the internal angle of each wall relative to the flat sheet of the single lining sheet may be substantially 45 degrees.

In other embodiments, the interior angle of the wall can be any angle selected from the range of substantially 45 degrees to 60 degrees.

In an illustrative example, the base section can span a distance of substantially 2 mm to 3 mm between each of the walls.

The entire disclosures of all of the applications, patents, and publications, which are hereby incorporated herein by reference in its entirety herein in

References to any prior art in this specification are not to be taken as an admission of any part of the common general knowledge in the field of the field of the art in the world.

The present invention may also be broadly referred to as the components, elements and features referred to or indicated individually or collectively (in any or all combinations of two or more of the components, elements or features) in the specification of the application. .

Where integers or components of known equivalents have been mentioned in the foregoing description, such integers are generally incorporated herein as if individually stated.

It should be noted that various changes and modifications of the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the invention and without departing from the scope of the invention. Accordingly, such changes and modifications are intended to be included within the present invention.

The aspects of the invention have been described by way of example only and it should be understood that Modifications and additions are made to the scope of the patent application as defined in the scope of the patent application.

1000‧‧‧Single-sided cardboard

1001‧‧‧ longitudinal crease

1002‧‧‧ grooves

Y‧‧‧ distance

Claims (4)

A single-sided paperboard comprising: a plurality of laterally spaced apart creases intersecting substantially orthogonally to a longitudinal axis of each of the grooves; wherein each crease and adjacent creases are calculated by the following formula Separate distance Y: Y = groove height × 5. An apparatus for making a single-sided paperboard, the apparatus comprising: a single veneer unit that is already downstream; a first roll comprising a plurality of laterally spaced apart circumferential tracks, the plurality of laterally spaced apart circumferential tracks The circumferential axis is substantially orthogonal to the axis of rotation of the first roller; wherein, in use, the crease cutter blade presses the crease tip into the single sided paperboard to be substantially orthogonal as the single sided paperboard passes the roller The grooves are folded in the direction of the groove; and wherein the distance Y of each of the crease tips from the adjacent crease tip is calculated by the following formula: Y = groove height x 5. A single-sided paperboard comprising: a plurality of transversely spaced creases intersecting substantially orthogonally to a longitudinal axis of each of the grooves; a plurality of laterally spaced apart creases oriented toward the RHS thereof An angle of substantially 20 to 70 degrees intersects the longitudinal axis of each of the grooves; a plurality of laterally spaced apart creases at an angle of substantially 20 to 70 degrees toward the LHS thereof The longitudinal axes of each of the equal grooves intersect, wherein the distance separating each crease from the adjacent parallel crease is calculated by the following formula Y: Y = groove height × 12.5. An apparatus for making a single-sided paperboard, the apparatus comprising: a single veneer unit that is located downstream; a first roll comprising a plurality of laterally spaced apart crease cutters, the plurality of laterally spaced apart folds The cutter head has its circumferential axis substantially orthogonal to the axis of rotation of the first roller; at least one other roller comprising: a) a plurality of spaced apart circumferential tracks, the plurality of spaced circumferential tracks having their circumferential axes The axis of rotation of the second roller is at an angle of substantially 20 to 70 degrees toward its LHS; and/or b) the third roller comprising a plurality of spaced apart circumferential tracks, the plurality of spaced apart circumferential tracks having a circumference The shaft and the axis of rotation of the second roller are at an angle of substantially 20 to 70 degrees toward RHS thereof; wherein the rollers all position the associated roller on the side of the single-sided paperboard relative to the side of the first roller On one side; wherein the distance Y separating each of the first, second and third rolls from the adjacent track is calculated by the following formula: Y = groove height x 12.5.