Mechanism for effecting interlock of multiple sheet continuous business forms
US4114869A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1977 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Mar 28, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/0281
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A highly efficient, shear-cutting, multiple die apparatus and method for interlocking elongated, multiple-sheet glued webs such as business forms or computer print out paper during fabrication thereof is provided which positively locks the web sheets against relative shifting as can occur when the web is zigzag folded, in order to prevent "tenting", or permanent, glue-set misalignment between respective web plies at the fold lines thereof. The preferred apparatus includes individual, mated pairs of rotatably mounted, transversely oriented, multiple-blade, pointed, web-shearing and deforming dies which are rotated to cooperatively engage, shear-penetrate and deform a moving web to produce a series of transversely extending, side-by-side, marginal, alternately displaced interlocking strips which effectively prevent significant relative longitudinal shifting between the web plies. The blade tips of the cooperating dies interfit during the web-shearing and displacing operation and serve to provide equal support and driving force for the web on opposite sides thereof, so that the web experiences minimum disturbance and no initiating causes for web skewing. The blade tips are contoured s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.