Patent US3593374A successfully refreshed from Google Patents.
US3593374A
Expired / Lapsed
US
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Device for bottom-finishing blow molded hollow plastic articles
Assignee: Compagnie Francaise de Raffinage SA
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Filing: 1969-09-12
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Granted: 1971-07-20
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Expires: 1989-09-12
Abstract
Abstract When hollow plastic articles such as bottles are blow molded in molds having a plurality of seperable parts, an excess ''''tail'''' or ''''flash'''' is produced, particularly at the bottom of the bottle, by plastic materials beyond the extent of the mold cavity, which excess must be cut off or removed in finishing the articles. Here such flash removal at the bottom of the article is accomplished without hand work and while the article is still in the mold, by pinching the ''''flash'''' between a reciprocally movable and a stationary serrated surface and shearing or tearing the excess material away from the article upon movement of one serrated surface with respect to the other.
Inventors
- 👤 Michel Siard
- 👤 Daniel Pellerin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:08
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/48; B29C49/50; Y; Y10; Y10S; Y10S425/00; Y10S425/806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
Apparatus as recited in claim 1 in which said serrations on said reciprocal slide are disposed at an angle to the axis thereof and at an angle to said serrations on said stationary surface of said other mold part.
Claim 2
Dependent Claim
42 words
Apparatus as recited in claim 2 in which said serrations on said stationary mold part are disposed at an angle to the axis of said reciprocal slide and opposite to the angle between said serrations on said slide and said axis thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |