Apparatuses for forming objects with undercut portions

Details Apparatuses for forming objects with undercut portions Apparatuses for forming objects with undercut portions

2011-05-10

2011-05-10

Del Sole, Joseph S (Department: 1743)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

C425S34800S, C425S408000, C425S412000

Reexamination Certificate

active

07939005

ABSTRACT:
An apparatus for forming an object from a dose of plastics comprises a die arrangement provided with a cavity for receiving said dose and with at least two parts that are reciprocally movable for shaping an undercut portion of said object, at least one fluid for applying a clamping force so as to keep said at least two parts in contact; said at least one fluid is such as to increase discontinuously said clamping force from an initial force that is applicable when said dose is substantially contained in said cavity to a final force applicable when said at least two parts shape said undercut portion.

REFERENCES:
patent: 2980960 (1961-04-01), Cropp
patent: 3778213 (1973-12-01), Di Settembrini
patent: 3864981 (1975-02-01), Schlegel
patent: 4529372 (1985-07-01), Saumsiegel
patent: 5932155 (1999-08-01), Ingram
patent: 6416312 (2002-07-01), Gonser et al.
patent: WO 03/072333 (2003-09-01), None
patent: WO 2005/058572 (2005-06-01), None
patent: WO-2006/040630 (2006-04-01), None
International Search Report for PCT/EP2006/064921 mailed Mar. 26, 2007.
International Preliminary Report on Patentability for PCT/EP2006/064921.

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