Apparatus for introducing plastic material into an annular...

Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to evacuate mold or provide controlled environment

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C425S564000, C425S812000

Reexamination Certificate

active

07118371

ABSTRACT:
An injection molding apparatus (10, 110) for molding an annular thermoplastic element, such as an annular closure element (E) with no more than a single weldline in the annular extent of the thermoplastic element. The thermoplastic element is molded in an annular mold cavity (12, 112), and moldable thermoplastic material (M) is introduced into the mold cavity from a coaxially-aligned annular flow path (18, 118) that is defined between a sliding sleeve (24, 124) and an annular member (22, 122). The sliding sleeve surrounds and is slideable with respect to a fixed pin (26, 126) and is slideable between a first, or forward, position, where no thermoplastic material can flow into the mold cavity, and a second, or rearward, position, where thermoplastic material can flow into the mold cavity. Thermoplastic material is introduced into the annular flow path, at a location upstream of the second position of the sliding sleeve, in a single stream through a passage (28, 128) to limit the weldlines in the molded thermoplastic element to no more than one.

REFERENCES:
patent: 4512730 (1985-04-01), Kudert et al.
patent: 4942010 (1990-07-01), Baker
patent: 5238378 (1993-08-01), Gellert
patent: 6179604 (2001-01-01), Takeda
patent: 6402503 (2002-06-01), Hickman
patent: 29609356 (1996-07-01), None
patent: 10039864 (2002-02-01), None
patent: 0385175 (1990-09-01), None
patent: 0714747 (1996-06-01), None
patent: 10016005 (1998-01-01), None
patent: 11170310 (1999-06-01), None
patent: 11170308 (1999-09-01), None
patent: WO 91/18727 (1991-12-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for introducing plastic material into an annular... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for introducing plastic material into an annular..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for introducing plastic material into an annular... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3624769

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.