Apparatus for making a tubular sheath of plastic material

Details Apparatus for making a tubular sheath of plastic material Apparatus for making a tubular sheath of plastic material

1985-11-13

1987-01-13

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Severing means is perforator

264DIG73, 264DIG81, 425307, 425308, 425377, 425392, B29C 4700, B29C 5526, B29C 6108

Patent

active

046361626

ABSTRACT:
Apparatus for making a tubular plastic sheath having one or more imperforate panels around the periphery of the sheath with intervening plastic net connecting the imperforate panels, the apparatus including an extruder, perforating means and stretching means, the improvement being extrusion means to form bands of different thickness asbout the sheath the perforation means being positioned such as to perforate only bands of one thickness.

REFERENCES:
patent: 3137746 (1964-06-01), Seymour et al.
patent: 3841815 (1974-10-01), Labarre
patent: 4455337 (1984-06-01), Lloyd et al.
patent: 4470942 (1984-09-01), Beretta
patent: 4536429 (1985-08-01), Mercer

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