Patent US3797985A successfully refreshed from Google Patents.
US3797985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excess parison remover
Assignee: Continental Can Co Inc
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Filing: 1972-02-22
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Granted: 1974-03-19
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Expires: 1992-02-22
Abstract
Abstract Apparatus for use in combination with an extrusion blow mold process for disposing of excess extruded tubular material not utilized within the mold. Such apparatus includes metallic means carried by the mold halves for grasping and cooling the free end of such extruded material, and means for controllably releasing such material at an appropriate location within the cycle of the molding apparatus.
Inventors
- 👤 E Garver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:46
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/44; B29C33/442; B29C49/00; B29C49/42; B29C49/48; B29C49/50; B29C49/70; Y; Y10; Y10S; Y10S425/00; Y10S425/806
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A molding apparatus comprising a mold formed in at least two halves and defining therebetween a mold cavity, said mold being of the type which opens and closes and is particularly constructed to receive therein an extruded plastic material tube and to pinch the tube closed at opposite ends of the cavity leaving at at least one end of said cavity excess plastic material, first release means for ejecting a molded article from said mold, and second release means carried by said mold for separately and later ejecting excess plastic material from said mold.
Claim 2
Dependent Claim
94 words
A molding apparatus comprising a mold formed in at least two halves and defining therebetween a mold cavity, said mold being of the type which opens and closes and is particularly constructed to receive therein an extruded plastic material tube and to pinch the tube closed at opposite ends of the cavity leaving at at least one end of said cavity excess plastic material, first release means for ejecting a molded article from said mold, and second release means carried by said mold for separately and later ejecting excess plastic material from said mold.
Claim 3
Dependent Claim
46 words
The molding apparatus of claim 1 wherein there are retaining means carried by said mold at said cavity one end for clasping and retaining excess plastic material attached to a selected one of said mold halves when said mold opens subsequent to a moldiNg operation therein.
Claim 4
Dependent Claim
25 words
The molding apparatus of claim 2 wherein said second release means are operatively associated with said retaining means for ejecting the plastic material retained thereby.
Claim 5
Dependent Claim
47 words
The molding apparatus of claim 2 wherein said retaining means includes a plate carried by said one mold half and having a recess therein for receiving excess plastic material, and a second plate carried by the other mold half for compacting excess plastic material into said recess.
Claim 6
Dependent Claim
45 words
The molding apparatus of claim 4 wherein said retaining means are formed of a heat conductive material and are in heat conductive contact with the remainder of said mold for transferring heat from the excess plastic material and to rigidify the same in said notch.
Claim 7
Dependent Claim
42 words
The molding apparatus of claim 2 wherein said retaining means are formed of a heat conductive material and are in heat conductive contact with the remainder of said mold for transferring heat from the excess plastic material and to rigidify the same.
Claim 8
Dependent Claim
40 words
The molding apparatus of claim 1 together with single actuator means for said first and second release means and multiple control means for actuating said single actuator means in sequence to effect the timed actuation of said single actuator means.
Claim 9
Dependent Claim
41 words
The molding apparatus of claim 7 wherein there is a lost motion connection between said single actuator and said second release means, and said multiple control means is of the type providing for different degrees of actuation of said single actuator.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |