Apparatus for driving moving webs in bag making machines
US4003298A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1976 |
| Grant date | Jan 18, 1977 |
| Priority date | — |
| Expiry date | Feb 9, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B70/10
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A machine for discontinuously driving a web moving continuously through the machine, having web pulling means, a web shuttle having the web trained thereabout, shuttle drive means for reciprocating the shuttle to alternately take up and pay out the web, and an endless looped belt drivingly interconnecting the web pulling means and the web shuttle for stopping and starting a portion of the belt associated with the web pulling means and thereby the web pulling means synchronously with the take-up and pay-out movements of the web and web shuttle, in which the web shuttle comprises a pair of shuttle members, a first upstream member and a second downstream member relative to the direction of web movement, each shuttle member being independently mounted in the machine for reciprocation, connected outside the loop of the belt to the shuttle drive means, and secured against the loop of the belt by the drive means for reciprocation of the shuttle members in unison, thereby stopping and starting the portion of the belt associated with the web pulling means and simultaneously stopping and starting the web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.