System for creating linerless pressure sensitive coil of stamps
US6655435B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2001 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Oct 24, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A system for creating a coil of stamps from a web of stamp material having an adhesive applied to a side thereof is provided. The system includes an anvil and a perforation die cooperating therewith with the web passing therebetween in order to perforate the web. The web is passed between the anvil and the die with the adhesive side thereof facing the anvil. The anvil is chilled so as to inhibit the adhesive from adhering thereto as the web is perforated. The anvil may be chilled from an outer surface thereof, or may be hollow and chilled from an inner surface thereof. In the former case, the system preferably includes a trough holding a chilling material through which at least a portion of the outer surface of the anvil is passed. Where the anvil is chilled from an inner surface thereof, a cooling fluid is preferably passed therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.