Process for producing a sheet of individually severable and releasable stamps
US5983768A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1998 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Mar 31, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/0222
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus and method is provided for simultaneously perforating and cutting a lithe sheet material having multiple layers containing at least an upper and lower layer, comprising a knife die having a cutting edge, wherein the cutting edge is contained in the same plane, and an anvil die located opposite the knife die, wherein the surface of the anvil die contains a pattern of cavities which corresponds to the locations where primarily only the upper layer of the material is cut completely through and protrusions of the anvil primarily correspond to the locations where the entire thickness of the material is cut along the same line as the cut through the upper layer. A sheet material of removable shapes is also provided comprising an upper layer having a printed side and a self adhesive side, and a lower layer having a release surface adjacent the upper layer's self adhesive side, wherein a shape has been completely cut out of the upper layer so that the shape can be pealed from the lower layer and the lower layer has been perforated through its thickness along all or part of the same lines as the cut shape so that the lower layer can either be kept in whole or torn along the per…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.