Continuous paper sheet tearing-up apparatus
US5104022A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1989 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Dec 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T225/35
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A continuous paper sheet has a plurality of transversal perforation lines and a plurality of holes formed in the longitudinal margins of the paper sheet. The paper sheet is torn by two pairs of nipping rollers including a pair of upper and lower feed-in rollers and another pair of upper and lower pulling rollers. The pulling rollers of the latter pair rotate at a speed higher than that of the feed-in rollers so that the part of the sheet placed between the former pair of rollers and the latter pair of rollers is pulled or given tension, thus being torn and separated. After it has been confirmed the continuous paper sheet has been placed on a stand at a predetermined position, the length of the continuous paper sheet as folded is measured. The resultant measurement is compared to standard sizes previously inputted to a CPU in order to correct it to the approximate standard size. According to the corrected standard size and the sheet thickness separately measured, the tearing operation of the pairs of feed-in rollers and high speed or pulling rollers is controlled in order to give the continuous paper sheet a difference in transferring speed and to tear-off a sheet at the predetermin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.