Apparatus for fastening a corrugated sheet to a flat sheet

Plastic article or earthenware shaping or treating: apparatus – Preform assembly means and means for bonding of plural... – Opposed coacting press members

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Details

425346, 425348R, 29522, 156222, 113116FF, B29C 2712, B29C 2714

Patent

active

039934284

ABSTRACT:
A structure is described which consists of a corrugated and a flat sheet or film of thermoplastic material, which sheets are positively connected by matching depressions with undercuts arranged along the grooves of the corrugated sheet and at corresponding points of the flat sheets. The structure is especially suited to make inserts for trickling-filter towers.

REFERENCES:
patent: 2035403 (1936-03-01), Przyborowski
patent: 3359935 (1967-12-01), Rosebottom
patent: 3451367 (1969-06-01), Henrickson
patent: 3579809 (1971-05-01), Wolf
patent: 3771216 (1973-11-01), Johnson

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