EP0786356A1 - Dispositif pour positionner une pile de feuilles dans un appareil thermique pour relier - Google Patents

Dispositif pour positionner une pile de feuilles dans un appareil thermique pour relier Download PDF

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Publication number
EP0786356A1
EP0786356A1 EP96100879A EP96100879A EP0786356A1 EP 0786356 A1 EP0786356 A1 EP 0786356A1 EP 96100879 A EP96100879 A EP 96100879A EP 96100879 A EP96100879 A EP 96100879A EP 0786356 A1 EP0786356 A1 EP 0786356A1
Authority
EP
European Patent Office
Prior art keywords
clamping element
clamping
stack
heating plate
documents
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96100879A
Other languages
German (de)
English (en)
Other versions
EP0786356B1 (fr
Inventor
Dirk Maes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Esselte NV
Original Assignee
Esselte NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Esselte NV filed Critical Esselte NV
Priority to DE59604999T priority Critical patent/DE59604999D1/de
Priority to EP96100879A priority patent/EP0786356B1/fr
Priority to US08/784,525 priority patent/US5775864A/en
Publication of EP0786356A1 publication Critical patent/EP0786356A1/fr
Application granted granted Critical
Publication of EP0786356B1 publication Critical patent/EP0786356B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42C—BOOKBINDING
    • B42C9/00—Applying glue or adhesive peculiar to bookbinding
    • B42C9/0056—Applying glue or adhesive peculiar to bookbinding applying tape or covers precoated with adhesive to a stack of sheets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S412/00—Bookbinding: process and apparatus
    • Y10S412/902—Heating and pressing

Definitions

  • the invention relates to a device for positioning a stack of documents during the heating and / or cooling phase in a thermal binding device, the binding device for receiving the stack of documents having an elongated opening on its top, which extends into the interior of the thermal binding device and which consists of a base plate , two end faces and at least one side face.
  • hot melt adhesive process There are different methods for joining loose sheets or documents into a bound product.
  • One of these processes is the so-called hot melt adhesive process.
  • the loose sheets or documents to be bound are inserted into a cover, the back of this cover being prepared on the inside with a hot-melt adhesive.
  • the hot-melt adhesive begins to liquefy.
  • the longitudinal edges of the sheets or documents penetrate the adhesive under the influence of gravity.
  • the hot melt adhesive hardens during the following Cooling phase, the individual sheets or documents are glued to one another or to the cover.
  • the thermal binding devices are usually provided with a clamping device.
  • the clamping device has yet another function: the heat required by the heating plate to melt the hot melt adhesive has an influence both on the papers to be bound and on the usually transparent front of the cover, which consists of a plastic material. In particular in the production of products of small thickness, the corresponding paper sheets to be bound and the front side of plastic material would be deformed without corresponding lateral holders.
  • the clamping device consists of two plates arranged in parallel, which form the side walls of the elongated opening above the heating plate.
  • the rear of the two plates is rigidly connected to the thermal binding device, while the second, front plate is displaceable parallel to the first.
  • the second plate is pressed against the front of the product to be bound, as a result of which the sheet or document stack is clamped between the two plates. Since the second plate can be locked in different positions with respect to the first one, sheet or document stacks of different thicknesses can be held in the desired position with the known clamping device.
  • This desired position is characterized in that the entire surface of the back cover of the product to be bound is in contact with the heating plate or the cooling surface.
  • the invention is based on the object of proposing an inexpensive clamping device which makes it possible to produce high-quality products in a thermal binding device.
  • the object is achieved in that at least one clamping element with an at least partially curved surface is provided, that the clamping element is designed such that a clamping surface of the curved surface of the clamping element is in contact with the stack of documents in use and presses it against the side surface of the opening and that the clamping element at least partially covers the base of the opening when not in use.
  • the curvature of the surface of the clamping element is dimensioned such that the clamping surface - i.e. the narrow region of the clamping element which is in contact with the stack of sheets or documents - is essentially independent of the thickness of the Document stack always lies in a desired area of the document stack.
  • one of the two cover surfaces of a cover is usually made of transparent plastic material. This transparent cover surface immediately adjoins the back cover.
  • a narrow area of the transparent cover surface, which directly adjoins the connecting seam between the cover surface and the back cover is particularly susceptible to deformation during the heating phase.
  • the strength of the deformation depends on the heating temperature, the binding time and the ratio between the thickness of the stack of sheets or documents to be bound and the width of the back cover of the available cover.
  • the clamping device according to the invention is now designed such that, regardless of the thickness of the product to be bound, it always develops its optimal clamping effect in the previously defined, critical area of the product to be bound.
  • the clamping element is fastened in the elongated opening of the thermal binding device by means of a pivot bearing and a spring element.
  • the pivot bearing is attached in the area of the upper edge of the clamping element.
  • the clamping element is attached to the binding device in such a way that it projects into the elongated opening.
  • the clamping element is pressed against the opposite side surface of the opening due to the spring force acting; when not in use, the heating plate is covered by the clamping element. This on the one hand prevents heat dissipation from the heating plate, and on the other hand effectively prevents contamination of the heating plate or the cooling surface due to contamination.
  • the clamping element instead of the pivot bearing, it is also possible to manufacture the clamping element from a material which, when not in use, rests on the opposite side face of the elongated opening and which, when the stack of documents is inserted, yields to the pressure due to its flexibility and releases the corresponding opening.
  • the clamping element consists of a heat-resistant material.
  • a holder is provided for receiving the heating plate, the heating plate again forming the base of the opening.
  • the clamping element or the clamping elements is or are attached directly to this holder.
  • Bracket and clamping element (s) can be manufactured inexpensively by injection molding.
  • the clamping element consists of two laterally arranged partial elements which are connected to one another via a central part.
  • the central part cover the laterally arranged partial elements.
  • the heating plate or the base plate is covered in the elongated opening when not in use by the clamping element.
  • the clamping element consists of a piece of wire, the central region of which is connected to the holder of the heating plate or to the heating plate itself and the two end regions of which are in the form of wire clips.
  • the stack of documents is clamped between the clamping elements, which are now designed as wire clips, and the opposite side surface of the elongated opening.
  • the heating plate or the base and at least one of the side surfaces of the elongated opening are inclined at an acute angle to the horizontal.
  • the clamping element is designed as a cylindrical body which preferably has the same length dimension as the heating plate or the base.
  • Inclination of the heating plate and one of the two side walls also makes this configuration an extremely inexpensive solution.
  • gravity is used to achieve a sufficient clamping effect.
  • the elongated opening 2 consists of a base plate 8 forming the heating plate 13, a front and rear side wall 3 and two end faces.
  • the heating plate 13, like the rear side surface 3 of the elongated opening 2, is inclined by an angle ⁇ with respect to the horizontal. This configuration additionally stabilizes the document stack 10 within the elongated opening 2.
  • Document stacks 10 can be positioned up to a certain thickness d in the elongated opening 2.
  • the maximum thickness dmax is predetermined by the maximum available width of the opening 2.
  • the clamping element 4 is provided. The clamping element 4 is placed on the cover of the document stack 10 and presses the document stack in the area of the clamping surface 7 against the rear side surface 3 of the opening 2.
  • the clamping element 4 is pivotally and resiliently mounted in the front region of the elongated opening 2 of the thermal binding device 1.
  • the clamping element 4 protrudes into the opening 2 and covers the heating plate 13.
  • spring elements 11 are preferably provided on both sides of the pivot axis, which press the clamping surface 7 of the clamping element 4 against the stack of documents 10 and this against the rear side surface 3 of the elongated opening 2.
  • the spring elements 11 are preferably wire springs which are attached to the pivot axis from both sides.
  • the clamping surface 7 of the clamping element 4 is pressed against the rear side surface 3 of the elongated opening 2 and covers the heating plate 13 or the base surface 8, which - as already mentioned above - is also concerned a shelf can act to cool the heated back cover.
  • the heating plate 13 or the base 8 is protected from contamination on the one hand; on the other hand, we prevent the heat dissipation from the heating plate, as a result of which the heating phase of the heating plate 13 can be shortened considerably until the temperature required for the subsequent binding process is reached.
  • the clamping element 4 forms the front side surface 3 of the elongated opening 2 in any position. Furthermore, the curvature of the surface of the clamping element 4 facing the document stack 10 is designed in accordance with a preferred development of the device according to the invention such that the respective clamping surface 7 is present at any time in a predetermined area of the document stack 10, regardless of the thickness of the document stack 10. This makes it possible to ensure that the clamping element 4 is always placed in the area preferred for achieving an optimal binding result above the spine of the document stack 10. This situation is shown in FIG. 1 by the designation X for the two positions of the clamping element 4 shown.
  • the clamping element 4 is pivotally attached in the region of the upper edge of the front side surface 3 of the opening 2 and thus replaces the front side surface 3.
  • FIG. 1a An alternative solution to this is shown in Fig. 1a.
  • the clamping element 4 is not attached to the upper edge of the opening 2 here, but within the opening 2. So here the clamping element 4 replaces the front one Side surface 3 only partially.
  • the curvature of the surface of the clamping element 4 facing the document stack 10 can be seen in FIG. 1a. As already described at the previous point, this is designed such that it always touches down in a predetermined area of the document stack 10 regardless of the thickness of the document stack 10 and presses it against the rear side face 3 of the opening 2.
  • This predetermined area - in the case shown it is marked by the line YY - is preferably just above the connection between the spine of the cover and the transparent front of the cover.
  • FIG. 2 shows a perspective view of a second embodiment of the device according to the invention.
  • the clamping device consists of two laterally arranged clamping elements 4a, 4b, which are connected to one another via a central part 4c.
  • the clamping device 4a, 4b, 4c is part of the holder 12 for the heating plate 13.
  • the holder 12 and the clamping device 4a, 4b, 4c are made of an elastic material, for example PA (polyacetate) by injection molding.
  • PA polyacetate
  • FIG. 3 shows a variant of the embodiment of the device according to the invention shown in Fig. 2a and Fig. 2b.
  • the central part 4c is replaced by a cover plate which covers the two clamping elements 4a, 4b.
  • FIG. 4 shows a perspective view of a third embodiment of the device according to the invention.
  • the clamping of the stack of documents 10 in the elongated opening 2 is here by means of two laterally arranged Wire bracket 14a, 14b achieved, the ends of which are free. Due to the elasticity of the metal wires, an excellent clamping effect can also be achieved with this extremely inexpensive solution.
  • the direction of movement of the clamping elements 14a, 14b is again indicated by arrows, as in the previous example.
  • 5a shows a perspective view of a fourth embodiment of the device according to the invention. This differs from the embodiment shown in FIG. 4 in that the wire ends 15a, 15b of the wire clips 14a, 14b are connected to one another here via a rail 16. Guide knobs 17 are mounted in the two end regions of the rail 16 and run in corresponding guide grooves 18. The guide grooves 18 are provided in the upstanding end faces 21 of the holder 12 or the heating plate 13. The directions of movement due to the flexibility of the clamping device 14a, 14b, 16 are again shown by arrows.
  • 5b shows the embodiment shown in FIG. 5a as an integral part of the elongated opening 2.
  • FIG. 6 A perspective view of a fifth embodiment of the device according to the invention is shown in FIG. 6.
  • the heating plate 13 - like the rear side face 3 of the elongated opening 2 (not shown separately) is inclined by an angle ⁇ with respect to the horizontal.
  • the clamping element 4 is designed as a cylinder which, following gravity, bears either on the rear side surface 3 or on the document stack 10.

Landscapes

  • Basic Packing Technique (AREA)
  • Clamps And Clips (AREA)
  • Package Closures (AREA)
EP96100879A 1996-01-23 1996-01-23 Dispositif pour positionner une pile de feuilles dans un appareil thermique pour relier Expired - Lifetime EP0786356B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59604999T DE59604999D1 (de) 1996-01-23 1996-01-23 Vorrichtung zum Positionieren eines Dokumentenstapels in einem thermischen Bindegerät
EP96100879A EP0786356B1 (fr) 1996-01-23 1996-01-23 Dispositif pour positionner une pile de feuilles dans un appareil thermique pour relier
US08/784,525 US5775864A (en) 1996-01-23 1997-01-17 Clamping device for positioning documents in a thermal binding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96100879A EP0786356B1 (fr) 1996-01-23 1996-01-23 Dispositif pour positionner une pile de feuilles dans un appareil thermique pour relier

Publications (2)

Publication Number Publication Date
EP0786356A1 true EP0786356A1 (fr) 1997-07-30
EP0786356B1 EP0786356B1 (fr) 2000-04-19

Family

ID=8222423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100879A Expired - Lifetime EP0786356B1 (fr) 1996-01-23 1996-01-23 Dispositif pour positionner une pile de feuilles dans un appareil thermique pour relier

Country Status (3)

Country Link
US (1) US5775864A (fr)
EP (1) EP0786356B1 (fr)
DE (1) DE59604999D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPR157600A0 (en) * 2000-11-20 2000-12-14 Silverbrook Research Pty. Ltd. An apparatus and method (bin04)
US6419437B1 (en) * 2001-01-08 2002-07-16 Chingsung Su Thermal binding mechanism

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818168A (en) * 1987-11-04 1989-04-04 General Binding Corporation Document support apparatus for thermal binding
EP0486032A1 (fr) * 1990-11-14 1992-05-20 Mita Industrial Co., Ltd. Dispositif pour relier des feuilles dans une couverture
US5143503A (en) * 1989-09-28 1992-09-01 Mita Industrial Co., Ltd. Image-forming apparatus provided with bookbinding device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3407105A (en) * 1965-06-24 1968-10-22 Gen Binding Corp Heat sealed binding
US5246325A (en) * 1989-05-18 1993-09-21 Canon Kabushiki Kaisha Sheet material binding apparatus
US5152654A (en) * 1990-10-04 1992-10-06 Minnesota Mining And Manufacturing Company Hot melt adhesive applicator
JP2710875B2 (ja) * 1991-06-14 1998-02-10 富士写真フイルム株式会社 ブック型アルバム作製装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818168A (en) * 1987-11-04 1989-04-04 General Binding Corporation Document support apparatus for thermal binding
US5143503A (en) * 1989-09-28 1992-09-01 Mita Industrial Co., Ltd. Image-forming apparatus provided with bookbinding device
EP0486032A1 (fr) * 1990-11-14 1992-05-20 Mita Industrial Co., Ltd. Dispositif pour relier des feuilles dans une couverture

Also Published As

Publication number Publication date
EP0786356B1 (fr) 2000-04-19
US5775864A (en) 1998-07-07
DE59604999D1 (de) 2000-05-25

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