Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – By fluid pressure actuated flexible diaphragm
Patent
1977-03-28
1978-10-10
Husar, Francis S.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
By fluid pressure actuated flexible diaphragm
425525, 425389, 249 59, B29D 2303
Patent
active
041193946
ABSTRACT:
Apparatus for forming an end finish on a hollow article having a plastically deformable tubular end portion terminating in an open end of the article. A mold surface surrounds the end portion in juxtaposition with its outer surface, and an expandable tubular membrane is received within the end portion in juxtaposition with the inner surface thereof. The interior of the membrane is sealed from the ambient, elongation of the membrane is restricted, and expansion of the membrane is limited to a lateral zone thereof coextensive with the end portion. The outer surface of the end portion is conformed to the mold surface by subjecting the interior of the membrane to a fluid under pressure to expand the membrane laterally in engagement with the inner surface of the end portion.
REFERENCES:
patent: 3032823 (1962-05-01), Sherman
patent: 3457592 (1969-07-01), Winchester, Jr.
patent: 3769394 (1973-10-01), Latreille
patent: 3817678 (1974-06-01), Armour
patent: 3955908 (1976-05-01), Farrell
patent: 3969060 (1976-07-01), Rosenkranz et al.
patent: 3981668 (1976-09-01), Farrell
patent: 4009982 (1977-03-01), Maier
Briggs William R.
Dittmann William A.
Husar Francis S.
Kerwin Joseph E.
Smith H. Lawrence
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