Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1997-06-13
1998-09-01
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 451, 264243, 264255, 26432812, B29C 4404, B29C 4406
Patent
active
058007512
ABSTRACT:
A paint brush handle has an outer layer of a comfortable, relatively soft elastomeric material that surrounds a rigid core of foamed polyolefin. The handle is made using a co-injection process in which a mold cavity is first coated by an initial partial shot of the elastomeric material and then filled by injecting more elastomeric material and polyolefin material containing a foaming agent simultaneously. The simultaneous shot of these materials is achieved by injecting the materials through a single inlet passage into the mold cavity in which the flows are concentric, with the elastomeric material surrounding the polyolefin material. The ferrule is attached to the handle using nails or other suitable fasteners which penetrate into the rigid inner core.
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Kuhns Allan R.
The Wooster Brush Company
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