Cutter/clamping means for bottom wrap 3/4 wrap apparatus
US5930975A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1997 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Jun 13, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/4645
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Bottom wrap/three-quarter wrap apparatus having an automatic web feeder for safely advancing a web fed from a supply roll to a main web feeder. The main feed rollers advance one length of the web and a cutter cuts the advanced length, completing one cycle of operation, after which the bottom wrap/three-quarter wrap apparatus is placed under control of a bundle feeder. The main feed roller pair are displaced from one another when the web passes between creasing rollers. When a predetermined length of web has been advanced to the creasing rollers a cutter cylinder moves a blade mounting plate in the cutting direction. A resilient clamping assembly arranged on the mounting plate momentarily clamps the web between the mounting plate and a web guide just prior to severing of the web by the blade, maintaining the web taut during cutting. The cutting blade is rapidly moved back to a position displaced from the web in preparation for a subsequent cutting operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.