Claims
- 1. Method for connecting the sheets of a multi-sheet printed product, in which the sheets are adhesively connected together point-wise by an adhesive introduced into at least one perforation formed in the sheets, comprising the steps of:
- forming at least one perforation extending through the sheets by using an elongated perforation tool having an outer surface and a pointed forward end by first driving the perforation tool at a penetration speed through the sheets and subsequently extracting the perforation tool at an extraction speed;
- applying an adhesive directly from outside of the perforation tool to the outer surface of the perforation tool either prior to the penetration by the perforation tool into the sheets or after the penetration by the perforation tool but prior to the extraction of the perforation tool, so that the adhesive applied to the perforation tool is transferred onto the sheets over the entire length of the at least one perforation during the driving or extracting of the perforation tool through the sheets; and
- providing at least one recess on the outer surface of the perforation tool for receiving the adhesive applied to the outer surface of the perforation tool, the at least one recess being open towards the outside of the perforation tool and extending rearwardly from the pointed forward end of the perforation tool over at least part of the length of the perforation tool.
- 2. A method in accordance with claim 1, wherein the step of applying an adhesive further comprises rotating the perforation tool during at least one of the driving and extracting movements.
- 3. A method in accordance with claim 1, wherein the step of extracting the perforation tool comprises a screwing out movement of the perforation tool to transfer the adhesive onto the sheets.
- 4. A method in accordance with claim 1; wherein the perforation tool comprises a plurality of perforation tools arranged in at least one row on a common support beam and the step of forming the at least one perforation comprises driving and extracting the plurality of perforation tools to form a plurality of perforations.
- 5. A method in accordance with claim 1 wherein the step of providing at least one recess comprises providing at least one thread-like groove to transfer the adhesive.
- 6. A method in accordance with claim 5, wherein the perforation tool is rotated at a rotation speed during at least one of the penetrating and extracting movements, and further comprising the step of matching the rotation speed of the perforation tool and at least one of the penetration speed and the extraction speed of the perforation tool to a pitch of said thread-like groove.
- 7. A method in accordance with claim 5, wherein the perforation tool is rotated at a rotation speed during at least one of the penetration and extraction movements, and further comprising the step of selecting the rotation speed of the perforation tool and at least one of the penetration speed and the extraction speed of the perforation tool so that they are not matched to a pitch of said at least one thread-like groove.
- 8. A method in accordance with claim 1 further comprising the step of selecting the penetration speed of said perforation tool differently from the extraction speed thereof.
- 9. A method in accordance with claim 2, wherein the perforation tool has a speed of rotation during the step of driving and a speed of rotation during the step extracting and further comprising the step selecting the speed of rotation of the perforation tool different during the driving movement from the speed of rotation during the extraction movement.
- 10. A method in accordance with claim 9, wherein the step of selecting comprises selecting one of the said speeds of rotation such that it is zero.
- 11. A method in accordance with claim 9 further comprising the step of varying at least one of said speeds of rotation during penetration and extraction of said perforation tool.
- 12. A method in accordance with claim 4 wherein the plurality of perforation tools have tips and further comprising the step of supporting the sheets during the adhesive bonding procedure on a support which has recesses or openings aligned with the perforation tools to receive the tips of these tools.
- 13. A method in accordance with claim 1 further comprising the step of arranging the sheets to lie on top of one another such that said sheets are bonded together point-wise along a line which coincides with a folded edge of the multi-sheet printed product.
- 14. A method in accordance with claim 1 further comprising the step of subjecting the adhesive to a treatment after its introduction into the at least one perforation.
- 15. A method in accordance with claim 14, wherein said step of treating comprises treating said adhesive with a thermal treatment.
- 16. A method in accordance with claim 1, wherein said driving and extracting steps comprise moving said perforation tool with a linear non-rotational movement.
- 17. An apparatus for connecting the sheets of a multi-sheet product with an adhesive introduced into at least one perforation formed in the sheets, comprising:
- at least one elongated perforation tool having a pointed forward end for forming at least one perforation in the sheets during a penetration and a subsequent extraction movement, the perforation tool having an outer surface and a closed tip;
- an adhesive applying tool applying adhesive directly from the outside of the at least one perforation tool to the outer surface of the at least one perforation tool;
- at least one recess formed on the outer surface of the at least one perforation tool for receiving the adhesive applied to the outer surface of at least one the perforation tool, the at least one recess being open towards the outside of the at least one perforation tool and extending rearwardly from the pointed forward end of the at least one perforation tool over at least a part of the length of the at least one perforation tool;
- means for advancing the at least one perforation tool through the penetration and extraction movements; and
- the adhesive applying tool applying adhesive either prior to the penetration by the at least one perforation tool or after the penetration of the perforation tool but prior to the extraction of the at least one perforation tool to transfer the adhesive to the walls of the at least one perforation during the penetration or extraction movement of the at least one perforation tool through the sheets.
- 18. Apparatus in accordance with claim 17, wherein said at least one recess is formed by one of a channel and a groove.
- 19. Apparatus in accordance with claim 17, wherein a rotary drive is provided for the perforation tool.
- 20. Apparatus in accordance with claim 19, wherein said rotary drive is reversible.
- 21. Apparatus in accordance with claim 17, further comprising a pressing means which presses against the stack of sheets during at least one of the penetration and extraction movement of the at least one perforation tool.
- 22. Apparatus in accordance with claim 17, wherein the at least one perforation tool comprises a plurality of perforation tool, and further comprising a support for the sheets provided with recesses or openings aligned with the perforation tools.
- 23. Apparatus in accordance with claim 17, wherein the adhesive applying tool is located directly above the sheets in a penetration region of the at least one perforation tool for applying adhesive to the outer surface of the at least one perforation tool.
- 24. Apparatus in accordance with claim 17, wherein the applying tool is moveable into a penetration region of the at least one perforation tool for applying the adhesive to the outer surface of the at least one perforation tool.
- 25. Apparatus in accordance with claim 17, wherein the at least one perforation tool comprises a plurality of perforation tools and wherein the adhesive applying tool comprises a plurality of adhesive outlet nozzles corresponding to the number of the perforation tools.
- 26. Apparatus in accordance with claim 25, wherein said adhesive applying tool is movable towards and away from the perforation tools.
- 27. Apparatus in accordance with claim 26, further comprising a synchronizing means which synchronizes the toward and away movement of the adhesive applying tool with the movement of the perforation tools, with the adhesive applying tool being arranged directly adjacent the perforation tools prior to driving them into the stack of sheets.
- 28. Apparatus in accordance with claim 17, wherein the adhesive applying tool is arranged beneath the sheets which lie on top of one another for applying the adhesive to the outer surface of the at least one perforation tool which penetrates through the sheets prior to the extraction of the at least one perforation tool.
- 29. Apparatus in accordance with claim 28, wherein said adhesive applying tool comprises at least one hollow chamber in or beneath a support which supports the sheets.
- 30. Apparatus in accordance with claim 17, wherein the at least one recess is defined by at least one groove of a screw thread shape.
- 31. Apparatus in accordance with claim 30, wherein the at least one groove has a thread-like shape which forms one of an undercut, a twist screw thread form, a direct screw thread form, and a cutting screw thread form.
- 32. Apparatus in accordance with claim 31, wherein the at least one perforation tool comprises a self-cutting threaded screw.
- 33. Apparatus in accordance with claim 17, wherein the at least one perforation tool is formed as a drilling needle and has a pointed end.
- 34. Apparatus in accordance with claim 17, wherein the at least one perforation tool is formed as a penetration needle and has a cross-section approximately in the form of a equilateral triangle, with at least one longitudinal channel forming the at least one adhesive receiving recess.
- 35. Apparatus in accordance with claim 17, wherein the at least one perforation tool is formed as a penetration needle and has a cross-section approximately of circular cross-section with a at least one sector-like longitudinal groove which serves as the at least one adhesive receiving recess.
- 36. Apparatus in accordance with claim 17, wherein the at least one perforation tool is formed as a penetration needle and has an elongated, knife-like, shallow oval shape in cross-section, with longitudinal grooves defining the at least one adhesive receiving recess being distributed around the outer periphery of the at least one perforation tool.
- 37. Apparatus in accordance with claim 17, wherein said at least one perforation tool comprises a plurality of perforation tools which are arranged in at least one row on a common carrying beam.
- 38. Apparatus in accordance with claim 37, wherein said beam is moveable towards the sheets.
- 39. Apparatus in accordance with claim 17, wherein said at least one perforation tool is arranged in a support.
- 40. Apparatus in accordance with claim 17, further comprising a support for the sheets which is movable towards the at least one perforation tool.
- 41. Apparatus in accordance with claim 40, wherein said support rotates about an axis which extends parallel to its longitudinal axis, and the at least one perforation tool is co-movable with the support.
Priority Claims (1)
Number |
Date |
Country |
Kind |
01 754/93 |
Jun 1993 |
CHX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/258,096, filed Jun. 10, 1994, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0 390 733 |
Mar 1989 |
EPX |
0 390 734 |
Mar 1990 |
EPX |
1 355 132 |
May 1974 |
GBX |
2106033 |
Apr 1983 |
GBX |
7900839 |
Oct 1979 |
WOX |
Non-Patent Literature Citations (1)
Entry |
Xerox Disclosure Journal "Binding Apparatus" Acquauiva, Thomas, vol. 1, No. 1, Jan. 1976 p. 1. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
258096 |
Jun 1994 |
|