US3911516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a push pin article
Assignee: Coats and Clark Inc
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Filing: 1974-07-16
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Granted: 1975-10-14
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Expires: 1994-07-16
Abstract
Abstract A base member of a push pin is formed by casting or molding, and a pin is inserted pointed end first into a hole in the base member and forced through the base member until the end opposite thereof lies below the surface of the base member. The material of the base member is then flowed over the end of the pin, by mechanical or heat techniques, to form a substantially complete layer over the end of the pin within the base member. The pins preferably extend at an acute angle to a flat surface of the base member. The push pin may have pins extending from opposite surfaces thereof, a loop shaped projection adapted to be affixed to a wire, or a hinge separating the base member into a hook portion and a portion carrying one or more pins. The push pin may have a contoured base member to facilitate the affixing of a picture wire to a hook formed on the base member. In another embodiment the push pin has a projection on the side thereof through which the pin extends, the projection having a rounded contour adjacent the pin, a radially outer surface, and an intermediate axially extending section between the rounded surface and the radially outer portion. The push pin may be formed with a pivoted lever, to serve as a wire clamp. For picture hanging purposes, the push pin may include a pair of pins extending from opposite sides of an elongated member and through projections, the elongated member having a saw tooth edge, with the planes of the saw tooth edge and the side of the elongated member adjacent thereto extending at an angle corresponding to portions of a nail extending at an angle in the wall, in order to facilitate the hanging of a picture on the wall.
Inventors
- 👤 Ruediger Einhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:37
CPC Classifications
B; B21; B21G; B21G5/00; A; A63; A63B; A63B53/00; A63B53/005; Y; Y10; Y10S; Y10S411/00; Y10S411/923; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49908; Y10T29/49925; Y10T29/49934; Y10T29/49945
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
157 words
A method for producing an article of the type including a base member having first and second opposite surfaces, and a pin projecting from said second surface, comprising, forming said base member with a substantially uniform diameter hole extending between said first and second surfaces, inserting the sharpened end of a pin in said hole from the end thereof at said first surface, said pin having a sharpened end, a blunt end a shank portion between said ends of substantially uniform diameter, said diameter slightly exceeding the diameter of the hole, and pushing said pin into said base member until said blunt end is positioned between said first and second surfaces, and flowing the material of said base member at said first surface surrounding said hole into said hole, whereby the portion of said hole between the blunt end of said pin and said second surface becomes substantially completely filled with the material of said base member.
Claim 2
Independent Claim
157 words
A method for producing an article of the type including a base member having first and second opposite surfaces, and a pin projecting from said second surface, comprising, forming said base member with a substantially uniform diameter hole extending between said first and second surfaces, inserting the sharpened end of a pin in said hole from the end thereof at said first surface, said pin having a sharpened end, a blunt end a shank portion between said ends of substantially uniform diameter, said diameter slightly exceeding the diameter of the hole, and pushing said pin into said base member until said blunt end is positioned between said first and second surfaces, and flowing the material of said base member at said first surface surrounding said hole into said hole, whereby the portion of said hole between the blunt end of said pin and said second surface becomes substantially completely filled with the material of said base member.
Claim 3
Dependent Claim
46 words
The method of claim 1 wherein said step of forming said base member comprises die casting said base member, and said step of flowing comprises mechanically staking the material of said base member at said first surface to flow into said hole at said first surface.
Claim 4
Dependent Claim
42 words
The method of claim 1 wherein said step of forming said base member comprises molding said base member of a thermoplastic material, and said step of flowing comprises heating the material of said base member adjacent said blunt end of said pin.
Claim 5
Independent Claim
194 words
A method for producing an article of the type including a base member having first and second opposite surfaces, and a pin projecting from said surface, comprising forming said base member with a substantially uniform diameter hole extending between said first and second surfaces and a projection from said first surface surrounding said hole, inserting the sharpened end of a pin into the end of said hole at said projection, said pin having a sharpened end, a blunt end and a shank portion between said ends of substantially uniform diameter, said diameter slightly exceeding the diameter of said hole, and forcing said pin through said hole until the blunt end lies within said base member below the end of said hole at said projection, whereby the sharpened end of said pin extends outwardly beyond said second surface, and then flowing the material of said base member at said projection into said end of said hole, whereby, following said step of flowing, the material of said base member at said projection substantially completely fills said end of said hole to form a substantially continuous layer of said material covering said blunt end of said pin.
Claim 6
Independent Claim
194 words
A method for producing an article of the type including a base member having first and second opposite surfaces, and a pin projecting from said surface, comprising forming said base member with a substantially uniform diameter hole extending between said first and second surfaces and a projection from said first surface surrounding said hole, inserting the sharpened end of a pin into the end of said hole at said projection, said pin having a sharpened end, a blunt end and a shank portion between said ends of substantially uniform diameter, said diameter slightly exceeding the diameter of said hole, and forcing said pin through said hole until the blunt end lies within said base member below the end of said hole at said projection, whereby the sharpened end of said pin extends outwardly beyond said second surface, and then flowing the material of said base member at said projection into said end of said hole, whereby, following said step of flowing, the material of said base member at said projection substantially completely fills said end of said hole to form a substantially continuous layer of said material covering said blunt end of said pin.
Claim 7
Dependent Claim
41 words
The method of claim 4 wherein said step of forming comprises die casting said base member of a die casting material, with said hole, and said step of flowing comprises mechanically staking the material of said base member at said projection.
Claim 8
Dependent Claim
49 words
The method of claim 5 in which said projection has the shape of a frustum, wherein said step of staking comprises mechanically forcing a staking tool against the end of said frustum, said staking tool having a concave configuration, whereby said layer is formed with a convex outer surface.
Claim 9
Dependent Claim
42 words
The method of claim 4 wherein said step of forming comprises molding said base member of a thermoplastic material, and said step of flowing comprises heat flowing the material of said base member at said projection into said end of said hold.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |