Perforated vacuum hold down surface

Details Perforated vacuum hold down surface Perforated vacuum hold down surface

2005-05-10

2005-05-10

Watson, Robert C. (Department: 3723)

Work holders

With fluid means

Vacuum-type holding means

Reexamination Certificate

active

06889967

ABSTRACT:
A vacuum hold down table includes a surface sheet having perforations arranged so as to reduce surface cracking when the surface sheet is subject to forces during use of the table; the perforations may also be arranged to that a greater hold down force is produced in that portion of the table where the workpiece will be located, this may be accompanied by varying the hole diameter and/or hole spacing.

REFERENCES:
patent: 3645832 (1972-02-01), Sauer
patent: 4301999 (1981-11-01), Higgins et al.
patent: 4702664 (1987-10-01), Lukens, Jr.
patent: 5487536 (1996-01-01), McEachin
patent: 6540001 (2003-04-01), McNestry
patent: 2784926 (2000-04-01), None
patent: 2109716 (1982-09-01), None
patent: PCTGB91/02176 (1991-12-01), None

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