Plastic article or earthenware shaping or treating: apparatus – With means lubricating cooperating apparatus parts
Patent
1975-02-24
1976-01-06
Husar, Francis S.
Plastic article or earthenware shaping or treating: apparatus
With means lubricating cooperating apparatus parts
249 59, 425438, 425129R, B29F 110
Patent
active
039307700
ABSTRACT:
An expandable poincon assembly to be used for forming a headpiece onto a preformed thin-walled plastic or laminate tube or bag provides a poincon upon which the loose fitting preformed thin-walled tube can be loaded. After tube loading, the poincon is inserted into a female forming member. Toward the end of the poincon's insertion stroke, a soupape which is mounted for axially movement within the head end of the poincon contacts the female forming member and then partially retracts into the head end of the poincon as the poincon continues to advance to the end of its insertion stroke. A conically-shaped washer mounted on the bottom end of the soupape is peripherally expanded by the continued advancement of the poincon after the top end of the soupape has contacted the female forming member. As the poincon reaches the end of its forward stroke, which will be the closed position of the poincon relative to the female forming member, the expanding periphery of the washer makes contact with the preformed tube body at a location below the portion of the tube body which extends beyond the poincon to effect a tight sealing fit between the poincon, the tube body and the female forming member to define a mold cavity in which the headpiece to the tube body may be formed.
REFERENCES:
patent: 2100985 (1937-11-01), Smally
patent: 2644198 (1953-07-01), Crawford
patent: 2763910 (1956-09-01), Braatelien
patent: 3020594 (1962-02-01), Makowski
patent: 3110931 (1963-11-01), Kadel
patent: 3125801 (1964-03-01), Fields
patent: 3313875 (1967-04-01), Magerle
patent: 3330006 (1967-07-01), Jenkins
patent: 3373479 (1968-03-01), Watt et al.
Gaudet David Alvin
Wathen, Jr. John Moss
American Can Company
Auber Robert P.
Husar Francis S.
Safran David S.
Ziehmer George P.
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