Claims
- 1. A device for creasing a product comprising a plurality of sheets folded along a fold line so as to flatten the folded product, the device comprising:folding means for initially folding an unfolded product to create the fold lines, nip-forming means for forming a creasing nip on the fold line and transport means for producing a relative movement between the formed creasing nip and the folded product along the fold line, wherein the transport means are provided with reversing means which, after displacement of the creasing nip along the fold line over the folded product in a first direction parallel to the fold line, whereby one or more sheets of the folded product are shifted in the said first direction, is operable to displace the creasing nip along the fold line over the folded product in a direction parallel to the fold line opposite to the first direction such that the shift is negated by the movement of the creasing nip in the opposite direction.
- 2. The device according to claim 1, wherein the nip-forming means are formed by at least one first roller adapted to roll along the fold line of a folded product.
- 3. The device according to claim 2, wherein the nip-forming means includes a second roller which forms a nip with the first roller for creasing the folded product on its fold line.
- 4. The device according to claim 3, wherein the creasing device comprises a fixed guide strip which extends through the creasing nip formed by the nip-forming rollers, a folded product disposed within said guide strip and adapted to be brought with its fold line into the creasing nip disposed on the side of the guide strip remote from the nip-forming rollers.
- 5. The device according to claim 4, wherein the guide strip is practically immovable in the creasing nip, in a direction parallel to the direction in which the axis of the nip-forming roller extends and is movable in a direction perpendicular to the flat plane traversed by the creasing nip.
- 6. The device according to claim 5, wherein the guide strip, in a direction in which the creasing nip is movable has a dimension larger than the longest fold line of a folded product for creasing and in that the maximum distance over which the creasing roller is adapted to roll over the guide strip corresponds to said larger dimension.
- 7. The device according to claim 6, wherein the guide strip forms an acute angle with the direction of the axis of the creasing roller in the direction parallel to the direction in which the axis of the nip-forming roller extends.
- 8. The device according to claim 7, wherein the guide strip is formed by a sheet of spring steel.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1008727 |
Mar 1998 |
NL |
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Parent Case Info
This application is a continuation continuation-in-part of co-pending application Ser. No. 09/276,723, filed on Mar. 26, 1999, the entire contents of which are hereby incorporated by reference and for which priority is claimed under 35 U.S.C. § 120; and this application claims priority of Application No. 1008727 filed in The Netherlands on Mar. 27, 1998 under 35 U.S.C. § 119.
US Referenced Citations (12)
Foreign Referenced Citations (5)
Number |
Date |
Country |
2023387 |
Nov 1971 |
EP |
2430114 |
Jan 1975 |
EP |
2618258 |
Jan 1977 |
EP |
0034921 |
Sep 1981 |
EP |
0748756 |
Dec 1996 |
EP |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09/276723 |
Mar 1999 |
US |
Child |
09/908806 |
|
US |