Cover for collapsing board

Details Cover for collapsing board Cover for collapsing board

1988-09-19

1990-07-24

Thomas, Alexander S.

Plastic article or earthenware shaping or treating: apparatus

Diverse distinct type shaping means

Shaping orifice and either a downstream preform reshaping...

425327, 428 99, 428122, B29C 4720

Patent

active

049432265

ABSTRACT:
A cover is provided for hardwood collapsing boards of the type employed in the manufacture of polyethylene film. The collapsing board covers are extruded in the form of channels from a flexible, but rigid or semi-rigid plastic synthetic resin material impregnated with graphite or another lubricating agent. The channel has a convex arcuate web to fit the front face of the collapsing board, and upper and lower flanges that overfit edges of the collapsing board. Lip members on the free edges of the upper and lower flanges snap fit behind the board to retain the cover on it. These covers absorb the wear and abrasion from the polyethylene film passing over the collapsing boards.

REFERENCES:
patent: 2058793 (1936-10-01), Hoffman
patent: 2856230 (1958-10-01), Adell
patent: 3752612 (1973-08-01), Duuren
patent: 4316348 (1982-02-01), Adell

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