Apparatus for generating a vacuum
US5979889A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Apr 15, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H5/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Apparatus (10) for engaging at least a portion (20b) of a signature (20a) in a hopper (14) and moving the portion relative to a stack of signatures (20) in the hopper includes a stem member (110) and a suction cup (150) mounted on the stem member. The stem member (110) is supported for movement toward and away from the stack of signatures (20) A venturi tube (160) is provided in the stem member (110) for generating a vacuum which is communicated to the suction cup (150). The vacuum in the suction cup (150) causes the portion (20b) of a signature (20a) to be gripped by the suction cup (150) and moved relative to the stack of signatures (20) in the hopper (14) upon movement of the stem member (110).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.