Machine for manufacturing, filling and conveying envelopes
US4156336A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1977 |
| Grant date | May 29, 1979 |
| Priority date | — |
| Expiry date | Nov 28, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B43/465
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A machine for manufacturing, filling and conveying envelopes obtained from a heat sealable sheet material, comprising a first closed loop conveyor, a second closed loop conveyor the first and the second conveyors having drive means imparting a continuous motion of constant speed thereto a plurality of envelope forming and delivering sets arranged along an envelope accepting path portion of the first conveyor and in spaced relationship to each other and adapted selectively to deliver open envelopes to the first conveyor along the envelope receiving path portion thereof, the first conveyor having first gripper means carried thereon second gripper means on the second conveyor and arranged therealong in spaced relationship to each other, the second gripper means having a pair of gripper arms mounted on the second conveyor for oscillation about respective axes parallel to each other, thereby to allow the gripper arms to approach and move away from each other when the arms are oscillated to maintain the envelopes gripped by the second gripper means in stretched condition when the arms are oscillated in a position at a distance away from each other and alternatively in a position of small…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.