Patent US3656381A successfully refreshed from Google Patents.
US3656381A
Expired / Lapsed
US
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Compound die for punching sheet members from circular blanks in punch pressers with vertical disposition of blanking planes
Assignee: Individual
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Filing: 1969-10-31
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Granted: 1972-04-18
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Expires: 1989-10-31
Abstract
Abstract Compound dies for punching sheet members from circular blanks in punch presses with a vertical disposition of the blanking planes. The compound die has a movable plate provided with punches, a lifter for removing a completed member and a means for centering the blank relative to the female die. The female die is arranged on a stationary plate the lower portion of which is provided with supports for holding the blank on the stationary support. The stationary plate has a device for holding the blank against the face of the female die comprising at least two movable holder. These holders are positioned in the blanking plane in opposite relationship and along an axis perpendicular to the direction of movement of the blank.
Inventors
- 👤 Vitaly Konstantinovich Gilev
- 👤 Volf Nakhimovich Evzlin
- 👤 Gennady Nikolaevich Kamalov
- 👤 Rafael Tevosovich Sarkisov
- 👤 Ernst Arakelovich Stephanian
- 👤 Rustam Makhmud Ogl Shakhmaliev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:21
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/22; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2135; Y10T83/2144; Y10T83/444; Y10T83/4501; Y10T83/4503; Y10T83/4508; Y10T83/546; Y10T83/566; Y10T83/5669; Y10T83/5742; Y10T83/5751; Y10T83/727; Y10T83/741; Y10T83/744; Y10T83/745
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
175 words
A compound die for punching sheet members from circular blanks in punch presses with a vertical disposition of the blanking plane, said die comprising: a stationary plate, a movable plate opposite said stationary plate, a female die positioned on said stationary plate, supports located in the lower portion of said stationary plate for supporting a blank on the stationary plate, punches positioned on said movable plate, a lifter for removing a completed member positioned on said movable plate, means on said movable plate for centering said blank relative to said female die, a device on the stationary plate for holding the blank against the face of said female die, said device including at least two movable holders located in the blanking plane in opposite relationship and along an axis perpendicular to the direction of movement of said blank, each movable holder comprising a spring-loaded wedge carrying an Sshaped plate the lower end of which is bent towards the face of the female die and the upper end of which is bent in the opposite direction.
Claim 2
Dependent Claim
175 words
A compound die for punching sheet members from circular blanks in punch presses with a vertical disposition of the blanking plane, said die comprising: a stationary plate, a movable plate opposite said stationary plate, a female die positioned on said stationary plate, supports located in the lower portion of said stationary plate for supporting a blank on the stationary plate, punches positioned on said movable plate, a lifter for removing a completed member positioned on said movable plate, means on said movable plate for centering said blank relative to said female die, a device on the stationary plate for holding the blank against the face of said female die, said device including at least two movable holders located in the blanking plane in opposite relationship and along an axis perpendicular to the direction of movement of said blank, each movable holder comprising a spring-loaded wedge carrying an Sshaped plate the lower end of which is bent towards the face of the female die and the upper end of which is bent in the opposite direction.
Claim 3
Dependent Claim
52 words
A compound die according to claim 1 comprising means for the movement of each of the holders including a wedge-shaped lever having one end which is rigidly secured to the movable plate and an opposite end which directly contacts said wedge during the approach of the movable plate towards the stationary plate.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |