Cutting assembly useful in bag machines
US4230029A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1978 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Oct 26, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/913
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A bag machine for permitting action on multiple widths of web and capable of high speed operation. A rigidifying beam supports the heat seal bar. The heat seal bar is thermally isolated from the beam and the flange of the beam is protected against heat loss. A belt and sprocket assembly that propels a cutter blade across the web path are aligned in a plane set at an angle to the axis of the beam. The sprockets have diameters comparable to the height of the beam and position the cutter blade adjacent the heat seal bar at the lower edge of the beam. The blade is attached by a plate inserted between teeth of the belt with a corresponding tooth omitted from the sprocket. An insulating heat shield also serves to support a protective curtain and a novel lift arrangement is provided for the entire head assembly and upper nip rolls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.