Method and apparatus for selecting the bias upon stacks of sheets in guillotine type cutting machines
US4757731A · kind A · utility
6Cited by
4References
19Claims
0Family size
Inventor
Key dates
| Filing date | Apr 23, 1987 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Apr 23, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/7547
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A guillotine type cutting machine wherein the length of cuts to be made in stacks of sheets determines the force with which a hold-down device bears upon a stack in the course of the cutting operation to prevent stray movements of the sheets. The force varies as a function of the length of the contemplated cuts and is regulated in such a way that the pressure of the hold-down device per unit area of a larger or smaller stack containing identical numbers and types of sheets is the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.