US4362290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold for plastic needlepoint sheet
Assignee: WESTMINSTER MARKETING Inc
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Filing: 1981-07-17
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Granted: 1982-12-07
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Expires: 2001-07-17
Abstract
Abstract An injection mold for molding plastic needlepoint sheets which have a plurality of aligned rows of perforations which define plastic threads therebetween in a lattice configuration. The mold has engageable top and bottom mold body halves with open uniform mold channels formed in each half in a lattice configuration wherein the channel lattices of the mold halves cooperatively mate with each other upon engagement to define a mold cavity therebetween for the molding of a needlepoint sheet. The lattice channels in the mold body halves are constructed whereby the lattice channels in one half define a greater total volume than that of the other half, such that the greater volume of plastic to be molded in the mold cavity is received in the ejection half of the mold. In order to facilitate removal of the molded sheet from the mold, the lattice mold channels in the mold body halves are contoured to define a resultant cross section of the thread of a needlepoint sheet to be molded which is polygonal. In order to compensate for possible misalignment or offset of the mold halves during the molding operation, the cross-sectional opening width of the lattice mold channels in one mold half are greater than that of the other mold half to provide an intentional mating mismatch between the mold channel openings of the respective mold halves.
Inventors
- 👤 Michael K. Marx
- 👤 Louis P. Musante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:08
CPC Classifications
B; B29; B29D; B29D28/00; B29C; B29C33/00; B29C45/00; B29C45/17; B29C45/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
127 words
In a mold having engageable top and bottom mold body halves with open uniform mold channels formed in each half in a lattice configuration wherein the channel lattices of the mold halves cooperatively mate with each other upon engagement of said mold halves to define a mold cavity therebetween for molding therein of a resultant needlepoint sheet of flexible plastic material having a plurality of aligned rows of perforations with said perforations defining plastic threads therebetween, the improvement comprising said open lattice channels in said mold body halves constructed whereby the lattice channels in one half define a greater total volume than that of the other half, such that the greater volume of plastic to be molded in said cavity is received in said one mold half.
Claim 2
Dependent Claim
127 words
In a mold having engageable top and bottom mold body halves with open uniform mold channels formed in each half in a lattice configuration wherein the channel lattices of the mold halves cooperatively mate with each other upon engagement of said mold halves to define a mold cavity therebetween for molding therein of a resultant needlepoint sheet of flexible plastic material having a plurality of aligned rows of perforations with said perforations defining plastic threads therebetween, the improvement comprising said open lattice channels in said mold body halves constructed whereby the lattice channels in one half define a greater total volume than that of the other half, such that the greater volume of plastic to be molded in said cavity is received in said one mold half.
Claim 3
Dependent Claim
41 words
The mold of claim 1, including ejection pin means in said one mold body half for ejecting a molded plastic needlepoint sheet from said lattice mold channels in said one mold body half after said mold body halves have been separated.
Claim 4
Dependent Claim
39 words
The mold of claim 1, wherein said lattice mold channels in said mold body halves are contoured to define a resultant cross section of the threads of a needlepoint sheet to be molded in said cavity which is polygonal.
Claim 5
Dependent Claim
13 words
The mold of claim 3, wherein said polygonal cross section is ten sided.
Claim 6
Dependent Claim
45 words
The mold of claim 1 or 3, wherein the cross-sectional opening width of the lattice mold channels in one mold half are greater than that of the other mold half to provide an intentional mating mismatch between the channel openings of the respective mold halves.
Claim 7
Dependent Claim
111 words
In a mold having engageable top and bottom mold body halves with open uniform mold channels formed in each half in a lattice configuration wherein the channel lattices of the mold halves cooperatively mate with each other upon engagement of said mold halves to define a mold cavity therebetween for molding therein of a resultant needlepoint sheet of flexible plastic material having a plurality of aligned rows of perforations with said perforations defining plastic threads therebetween, the improvement comprising said lattice mold channels in said mold body halves contoured to define a resultant cross section of the threads of a needlepoint sheet to be molded in said cavity which is polygonal.
Claim 8
Dependent Claim
111 words
In a mold having engageable top and bottom mold body halves with open uniform mold channels formed in each half in a lattice configuration wherein the channel lattices of the mold halves cooperatively mate with each other upon engagement of said mold halves to define a mold cavity therebetween for molding therein of a resultant needlepoint sheet of flexible plastic material having a plurality of aligned rows of perforations with said perforations defining plastic threads therebetween, the improvement comprising said lattice mold channels in said mold body halves contoured to define a resultant cross section of the threads of a needlepoint sheet to be molded in said cavity which is polygonal.
Claim 9
Dependent Claim
13 words
The mold of claim 6, wherein said polygonal cross section is ten sided.
Claim 10
Dependent Claim
45 words
The mold of claim 6 or 7, wherein the cross-sectional opening width of the lattice mold channels in one mold half are greater than that of the other mold half to provide an intentional mating mismatch between the channel openings of the respective mold halves.
Claim 11
Dependent Claim
116 words
In a mold having engageable top and bottom mold body halves with open uniform mold channels formed in each half in a lattice configuration wherein the channel lattices of the mold halves cooperatively mate with each other upon engagement of said mold halves to define a mold cavity therebetween for molding therein of a resultant needlepoint sheet of flexible plastic material having a plurality of aligned rows of perforations with said perforations defining plastic threads therebetween, the improvement comprising the cross-sectional opening width of the lattice mold channels in one mold half are greater than that of the other mold half to provide an intentional mating mismatch between the channel openings of the respective mold halves.
Claim 12
Dependent Claim
116 words
In a mold having engageable top and bottom mold body halves with open uniform mold channels formed in each half in a lattice configuration wherein the channel lattices of the mold halves cooperatively mate with each other upon engagement of said mold halves to define a mold cavity therebetween for molding therein of a resultant needlepoint sheet of flexible plastic material having a plurality of aligned rows of perforations with said perforations defining plastic threads therebetween, the improvement comprising the cross-sectional opening width of the lattice mold channels in one mold half are greater than that of the other mold half to provide an intentional mating mismatch between the channel openings of the respective mold halves.
References Cited (Backward Citations)
US1405998A
Cited
US1597961A
Cited
US1748626A
Cited
US2218612A
Cited
US2246513A
Cited
US2365740A
Cited
US2556590A
Cited
US2913767A
Cited
US3026569A
Cited
US4006879A
Cited
JPS5312961A
Cited
US4050666A
Cited
JPS5411964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |