Bursting machine
US4688708A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1986 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Sep 18, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T225/393
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A bursting machine is provided for separating discrete sheets from a continuous strip of sheets having uniformly spaced perforation lines across the width of the strip. A gauging device with numerical increments in the form of a linear scale is manually compared to the length of the discrete sheets to provide a predetermined number corresponding to a pulse count for entering into a control device through a manually settable device. The control device in turn is operatively connected to an electronic pulse counter. When the leading edge of the strip advances a predetermined increment after passing through a sensing device located downstream in the path of travel with respect to a first pair of feed rollers, a pulse generator attached to the driven first feed roller is actuated to generate pulses for counting to reach the preset number in the pulse counter. When the preset number is reached, a second pair of feed rollers is stopped through disablement of an electromagnetic clutch and enablement of a brake while the leading sheet is continued to be conveyed downstream by the first pair of feed rollers to effect a burst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.