Vacuum hold-down table for an automatically controlled system for working on sheet material
US4301999A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1979 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | Sep 10, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26F1/3806
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A vacuum hold-down table (36) is provided for holding sheet material (40) in place. The vacuum hold-down table (36) includes a plurality of foam layers (542, 544, 546, 548, 550, 552) integrally united to form a laminated monolithic core portion (560) for the table (36). A plurality of apertures (580) extend throughout the core portion (560), such that air flows throughout the core portion (560). A vacuum is provided through structure (608, 610) to the core portion (560) to effectuate a vacuum within the core portion (560) to generate a high flow rate of air passing through the apertures (480) and thereby maintain sheet material (40) on the surface (38) of the table (36).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.