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US3887984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Riveting apparatus and method
Assignee: Polaroid Corp
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Filing: 1974-03-15
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Granted: 1975-06-10
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Expires: 1994-03-15
Abstract
Abstract Wire slugs for use as rivets are passed from a slug-forming station to a partial riveting station where a ram forces a slug through a restricted orifice in a spring-loaded guide and clamp member so that the guide and clamp member is pressed against the parts to be riveted as the slug is forced through the orifice into aligned holes in the parts. The parts are positioned upon an anvil which may be a fixture mounted on a turntable moveable from station to station, and the anvil has recesses into which the lower portion of the slug is forced to form a lower cap. The hole in the bottom part is preferably slightly smaller than the hole through the top part so that the slug material will flow outwardly filling the top hole, locking the parts in place and rendering hole alignment noncritical. Upon retraction of the ram, the spring-loaded guide and clamp member is elevated above the partially formed rivet and the two joined parts. The subassembly and anvil may then be moved to a rivet completion station where formation of a top rivet cap may be completed.
Inventors
- 👤 Irving Erlichman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:44
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/02; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53709; Y10T29/5377
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
Riveting apparatus comprising a support, a guide and clamp member connected to said support for reciprocating movement relative to said support, means normally biasing said guide and clamp member to a first position, said guide and clamp member being provided with a passageway extending therethrough and including a restricted orifice, slug feed means for feeding a slug having a diameter slightly greater than the diameter of said orifice to a position contiguous to one end of said passageway and in alignment with said passageway, an anvil for supporting parts to be riveted with holes through the parts in substantial alignment with said passageway and adjacent the other end thereof, means to force said slug through said passageway so that the pressure generated as said slug passes through said orifice overcomes the action of said biasing means and moves said guide and clamp member into clamping engagement with said parts, said anvil being provided with recess means for reception of a portion of said slug to form cap means on one end of said slug.
Claim 2
Dependent Claim
174 words
Riveting apparatus comprising a support, a guide and clamp member connected to said support for reciprocating movement relative to said support, means normally biasing said guide and clamp member to a first position, said guide and clamp member being provided with a passageway extending therethrough and including a restricted orifice, slug feed means for feeding a slug having a diameter slightly greater than the diameter of said orifice to a position contiguous to one end of said passageway and in alignment with said passageway, an anvil for supporting parts to be riveted with holes through the parts in substantial alignment with said passageway and adjacent the other end thereof, means to force said slug through said passageway so that the pressure generated as said slug passes through said orifice overcomes the action of said biasing means and moves said guide and clamp member into clamping engagement with said parts, said anvil being provided with recess means for reception of a portion of said slug to form cap means on one end of said slug.
Claim 3
Dependent Claim
37 words
Apparatus according to claim 1 which includes means to complete the formation of a rivet from said slug subsequent to retraction of said force-providing means and return of said guide and clamp member to said first position.
Claim 4
Dependent Claim
40 words
Apparatus according to claim 1 wherein the passageway through said guide and clamp member further includes a mouth portion leading to said orifice and an outwardly flaring discharge portion configured to prevent binding of a partially-formed rivet in the passageway.
Claim 5
Dependent Claim
37 words
Apparatus according to claim 3 further comprising means to enable reciprocation of said guide and clamp member relative to said support in a vertical direction, and wherein said anvil is positioned beneath said guide and clamp member.
Claim 6
Dependent Claim
31 words
Apparatus according to claim 3 further comprising a plurality of indexed anvils moveable in sequence into position beneath said guide and clamp member with the parts to be riveted disposed thereon.
Claim 7
Dependent Claim
39 words
Apparatus according to claim 1 wherein said slug feed means comprise a reciprocating shear punch for shearing a slug from a continuous rod and for moving said slug into alignment with said passageway in said guide and clamp member.
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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |