Patent US2716352A successfully refreshed from Google Patents.
US4048890A
Expired / Lapsed
US
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Punching tool die
Assignee: RASKIN
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Filing: 1976-11-04
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Granted: 1977-09-20
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Expires: 1996-11-04
Abstract
Abstract The die of a punching tool has a body of relatively soft and elastically deformable material with a through hole in extension of a through hole of the die but of smaller section, corresponding to that of a punch which passes through the die with a clearance, so that as the punch is withdrawn waste pieces are retained in the body by elastic deformation.
Inventors
- 👤 Fritz Aeschbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:41
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/34; B21D37/00; B21D37/20; B21D37/205; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2122; Y10T83/2124; Y10T83/217; Y10T83/2172; Y10T83/929; Y10T83/9411; Y10T83/9423; Y10T83/9425; Y10T83/9437
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
In a stamping or punching tool comprising a die and a punch, in which the die has a through hole for receiving the punch, said hole having a greater cross-sectional area than the punch to receive the punch with a clearance, the improvement wherein the die comprises on a side thereof opposite the side in which the punch is inserted a body of softer and more elastic material than the material of the die, said body having a through hole in extension of said through hole of die but of a lesser cross-sectional area substantially equal to that of the punch.
Claim 2
Dependent Claim
101 words
In a stamping or punching tool comprising a die and a punch, in which the die has a through hole for receiving the punch, said hole having a greater cross-sectional area than the punch to receive the punch with a clearance, the improvement wherein the die comprises on a side thereof opposite the side in which the punch is inserted a body of softer and more elastic material than the material of the die, said body having a through hole in extension of said through hole of die but of a lesser cross-sectional area substantially equal to that of the punch.
Claim 3
Dependent Claim
18 words
A tool according to claim 1, in which said body is at least partially of a synthetic material.
Claim 4
Dependent Claim
14 words
A tool according to claim 1, in which said body is of hardened rubber.
Claim 5
Dependent Claim
15 words
A tool according to claim 1, in which said body is at least partially metallic.
Claim 6
Dependent Claim
146 words
In a puunching tool die having a workpiece-support surface with means defining a through-hole for the passage of a piece removed from a workpiece on said surface by a withdrawable punching tool punched through said workpiece into said through-hole, the improvement comprising on a side of said die opposite said surface, a body of material which is softer and more elastically deformable than the material of said die, said body having means defining a through-hole in extension of that of said die, but of lesser cross-sectional area, for elastically deforming and gripping said pieces removed from workpieces to retain said pieces in said body when said punch is withdrawn, said through-hole of said body having a length whereby it is able to retain the pieces removed from several successively punched workpieces while allowing said pieces to be intermittently driven therethrough said successively discharged from said body.
Claim 7
Dependent Claim
146 words
In a puunching tool die having a workpiece-support surface with means defining a through-hole for the passage of a piece removed from a workpiece on said surface by a withdrawable punching tool punched through said workpiece into said through-hole, the improvement comprising on a side of said die opposite said surface, a body of material which is softer and more elastically deformable than the material of said die, said body having means defining a through-hole in extension of that of said die, but of lesser cross-sectional area, for elastically deforming and gripping said pieces removed from workpieces to retain said pieces in said body when said punch is withdrawn, said through-hole of said body having a length whereby it is able to retain the pieces removed from several successively punched workpieces while allowing said pieces to be intermittently driven therethrough said successively discharged from said body.
References Cited (Backward Citations)
US2404793A
Cited
US3358538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |