Supporting bed for sheet material cutting machine and method of

Details Supporting bed for sheet material cutting machine and method of Supporting bed for sheet material cutting machine and method of

1986-12-16

1989-07-25

Yost, Frank T.

Work holders

With fluid means

Vacuum-type holding means

83451, 83658, 83925CC, 264321, 521 52, B26D 701, B32B 2322, B32B 3120, D06H 710

Patent

active

048505790

ABSTRACT:
A supporting bed for supporting a stack of sheet material in a cutting machine of the type retaining the material by means of a vacuum applied from below the supporting bed is manufactured from a composite structure of starting material including individual layers of reticulated foam material separated by at least one layer of a hot melt adhesive web. The composite structure is compressed under heat and pressure so as to be permanently reduced to approximately 10-35% of its initial thickness. The degree of compression, the temperature and compression time, and the porosity of the retriculated polyurethane foam starting material are selected to provide particular airflow and firmness characteristics for the finished supporting bed.

REFERENCES:
patent: 3025200 (1962-03-01), Powers
patent: 3325338 (1962-06-01), Geen
patent: 3405217 (1968-10-01), Garrett et al.
patent: 3777604 (1973-12-01), Gerber
patent: 4656906 (1987-04-01), Mozieka et al.

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