Control for bag making machine
US4077308A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1976 |
| Grant date | Mar 7, 1978 |
| Priority date | — |
| Expiry date | Jun 4, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B51/303
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Apparatus for making a succession of bags from a web of sheet material which has been printed with a series of spaced parallel bands of heat activatable adhesive located at intervals corresponding to the lengths of the bags to be made wherein the web is formed about a mandrel into a tube and advanced therealong to sealing instrumentalities situated forwardly of the mandrel in the direction of movement, a pair of endless belts paralleling the mandrel for advancing the tube along the mandrel toward the sealing instrumentalities and a detector responsive to the presence of a band of adhesive on the web and located at a place in the path of movement of the web which corresponds to a whole number of bag lengths from the sealing instrumentalities which controls the feeding means so as to feed one bag length at a time relative to the sealing instrumentalities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.