US3838653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trimming apparatus for tubular bodies
Assignee: Rexam Beverage Can Co
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Filing: 1973-04-23
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Granted: 1974-10-01
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Expires: 1993-04-23
Abstract
Abstract An apparatus for trimming uneven edges from drawn and ironed metal bodies, such as cans, and breaking, knurling and discarding the scrap ring. The apparatus has oppositely rotating parallel shafts, one having an axially rigid supporting member, cutter and knurling roller at a free end on which a can is supported and the other having an axially rigid rotating wheel with a blade and knurling member peripherally mounted on adjacent sectors thereof. The blade cooperates with the edge of the cutter which is remote from the free end to trim the edge and the knurling member cooperates with the knurling roller. The members mounted on the first shaft and the teeth of the knurling member are configured to provide superior, relatively trouble-free operation.
Inventors
- 👤 D Larkin
- 👤 R Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:47
CPC Classifications
B; B23; B23D; B23D31/00; B23D31/001
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
333 words
Apparatus for trimming uneven edges from drawn and ironed tubular metal bodies, comprising: two substantially parallel shafts including a body-tUrning shaft and a tool shaft, said body-turning shaft having a free end; a body-supporting member concentrically attached to said bodyturning shaft at said free end; an annular cutter member mounted concentrically on said bodyturning shaft axially inwardly of said body-supporting member, said cutter member having a circumferential surface with an edge closest to said free end of radial dimension less than said supporting member, said surface tapering outwardly from said edge to a cutter edge axially remote from said free end; a knurling roller mounted on said body-turning shaft axially inwardly of and adjacent to said cutter member, said knurling roller having circumferentially spaced teeth each extending radially to a position radially inward of said cutter edge, said supporting member, cutter member and knurling roller having a constant, rigid overall axial dimension; means to fully load a tubular body on said supporting member with said uneven edge extending over said knurling roller and to hold said body in fixed axial position during operations thereon; a rotating wheel mounted on said tool shaft; a blade circumferentially mounted on a first sector of said wheel and having a peripheral edge aligned to cooperate with said cutter edge to trim from a tubular body an endless ring of metal having said uneven edge; and a knurling member circumferentially mounted on a second sector of said wheel, adjacent said first sector, and having a peripheral portion with radially extending teeth aligned to mesh with said knurling roller to break and knurl said endless ring, said teeth of said knurling member and roller being configured such that the intersections of all planes normal to said shafts with each individual tooth are substantially congruent, and teeth on said knurling member closest said blade extend radially further than the remaining teeth thereon to mesh more deeply with said roller whereby to entrap and break said ring across its entire width.
Claim 2
Dependent Claim
333 words
Apparatus for trimming uneven edges from drawn and ironed tubular metal bodies, comprising: two substantially parallel shafts including a body-tUrning shaft and a tool shaft, said body-turning shaft having a free end; a body-supporting member concentrically attached to said bodyturning shaft at said free end; an annular cutter member mounted concentrically on said bodyturning shaft axially inwardly of said body-supporting member, said cutter member having a circumferential surface with an edge closest to said free end of radial dimension less than said supporting member, said surface tapering outwardly from said edge to a cutter edge axially remote from said free end; a knurling roller mounted on said body-turning shaft axially inwardly of and adjacent to said cutter member, said knurling roller having circumferentially spaced teeth each extending radially to a position radially inward of said cutter edge, said supporting member, cutter member and knurling roller having a constant, rigid overall axial dimension; means to fully load a tubular body on said supporting member with said uneven edge extending over said knurling roller and to hold said body in fixed axial position during operations thereon; a rotating wheel mounted on said tool shaft; a blade circumferentially mounted on a first sector of said wheel and having a peripheral edge aligned to cooperate with said cutter edge to trim from a tubular body an endless ring of metal having said uneven edge; and a knurling member circumferentially mounted on a second sector of said wheel, adjacent said first sector, and having a peripheral portion with radially extending teeth aligned to mesh with said knurling roller to break and knurl said endless ring, said teeth of said knurling member and roller being configured such that the intersections of all planes normal to said shafts with each individual tooth are substantially congruent, and teeth on said knurling member closest said blade extend radially further than the remaining teeth thereon to mesh more deeply with said roller whereby to entrap and break said ring across its entire width.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 wherein said extended teeth are tapered to a smaller width toward their ends.
Claim 4
Dependent Claim
11 words
The apparatus of claim 2 wherein there are two extended teeth.
Claim 5
Dependent Claim
11 words
The apparatus of claim 1 wherein there are two extended teeth.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |