US4753586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming composite products
Assignee: Ex-Cell-O Corp
•
Filing: 1987-03-12
•
Granted: 1988-06-28
•
Expires: 2007-03-12
Abstract
Abstract An apparatus for making composite plastic product includes a mold insert with locating boss formations preformed from high strength plastic having openings formed therethrough; and wherein the insert is configured to be located on a mold cover which carries a locking device to hold the insert in place and wherein the locking device includes automatically operated knock-out means that engage the boss to separate a molded part from the lid when the locking device is released.
Inventors
- 👤 Cass V. Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:46
CPC Classifications
B; B29; B29C; B29C70/00; B29C44/00; B29C44/02; B29C44/12; B29C33/00; B29C33/12; B29C33/14; B29C44/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
Apparatus for manufacturing a composite plastic structure comprising: a load supporting insert including rear bosses formed thereon; reaction injection mold means including a cavity member and a cover removably mounted on the cavity member for forming a cavity for said load supporting insert, said cover including locking devices integral therewith, said locking devices including gripping means for releasably gripping the rear bosses to locate the insert in place in the cavity member and bond said insert to a plastic material filling said cavity member.
Claim 2
Dependent Claim
84 words
Apparatus for manufacturing a composite plastic structure comprising: a load supporting insert including rear bosses formed thereon; reaction injection mold means including a cavity member and a cover removably mounted on the cavity member for forming a cavity for said load supporting insert, said cover including locking devices integral therewith, said locking devices including gripping means for releasably gripping the rear bosses to locate the insert in place in the cavity member and bond said insert to a plastic material filling said cavity member.
Claim 3
Dependent Claim
34 words
In the apparatus of claim 1, said rear bosses having tapered pins thereon, said gripping means including movable jaws for releasably gripping said tapered pins to secure said bosses to said cover during molding.
Claim 4
Dependent Claim
31 words
In the apparatus of claim 2, said locking devices further including knock-out pin means engageable with said bosses when said jaws are released for separating a finished part from said cover.
Claim 5
Dependent Claim
110 words
Apparatus for manufacturing a preform to be used in the manufacture of composite plastic structures comprising: a load supporting insert including rear bosses formed thereon; reaction injection mold means including a cavity member and a cover bowl loadable into said cavity member for forming a cavity for said load supporting insert, said cover including locking devices integrally formed thereon, said rear bosses including an extension thereon, said locking devices including a housing for receiving said extension when said cover is bowl loaded on said cavity member, and gripping means in said housing operable for releasably gripping said extension to locate and lock the insert in place in the cavity member.
Claim 6
Dependent Claim
110 words
Apparatus for manufacturing a preform to be used in the manufacture of composite plastic structures comprising: a load supporting insert including rear bosses formed thereon; reaction injection mold means including a cavity member and a cover bowl loadable into said cavity member for forming a cavity for said load supporting insert, said cover including locking devices integrally formed thereon, said rear bosses including an extension thereon, said locking devices including a housing for receiving said extension when said cover is bowl loaded on said cavity member, and gripping means in said housing operable for releasably gripping said extension to locate and lock the insert in place in the cavity member.
Claim 7
Dependent Claim
46 words
In the apparatus of claim 4, said extension having tapered surfaces and a shoulder thereon, said locking means including jaws engageable with said tapered surfaces, and means on said cover engageable with said shoulders when said jaws are engaged for locating said insert on said cover.
Claim 8
Dependent Claim
31 words
In the apparatus of claim 5, said locking devices further including knock-out pin means engageable with said bosses when said jaws are released to separate a mold part from said cover.
References Cited (Backward Citations)
US3363040A
Cited
US4106745A
Cited
US3914086A
Cited
US4058284A
Cited
US4420447A
Cited
US4519567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |