Method and apparatus for driving sealing elements in a packing machine
US4599850A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1984 |
| Grant date | Jul 15, 1986 |
| Priority date | — |
| Expiry date | Jul 30, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B65/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A packing machine for making filled and sealed bags from superposed wrapper sheets, has a pair of cooperating sealing rollers for providing longitudinal seams on the superposed wrapper sheets passed therebetween; a mechanism for rotating unidirectionally the sealing rollers in first and second consecutive steps for providing the longitudinal seams in two consecutive length portions, each corresponding to one-half of the predetermined length; a pair of cooperating sealing shoes movable towards and away from one another for assuming, respectively, a sealing position to provide a transverse seam on the superposed wrapper sheets and an idling position; and a mechanism for moving the sealing shoes, while in the sealing position, codirectionally with the travelling direction of the wrapper sheets during a period in which one of the two steps is performed and for moving the sealing shoes, while in the idling position, against the travelling direction during a period in which the other of the two steps is performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.