Patent US2110161A successfully refreshed from Google Patents.
Patent US3665795A successfully refreshed from Google Patents.
US3665795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two stage workstock locator for punch presses
Assignee: AT&T Teletype Corp
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Filing: 1969-12-15
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Granted: 1972-05-30
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Expires: 1989-12-15
Abstract
Abstract Workstock to be operated upon by a punch press is advanced into blocking engagement with a first locating device which is slidably mounted in the die of the punch press and which locates the workstock in a first position. When the punch press is operated a second locating device, positioned in the ram of the punch press, engages the first locating device and forces it beneath the bottom surface of the advancing stock. When the first locating device is depressed beneath the bottom surface of the workstock, the workstock partially advances over the first locating device and into engagement with the second locating device, which accurately locates it in a second and final position to be operated upon by the punch press. The bottom surface of the workstock holds the first locating device out of blocking engagement with the workstock, and after the punching operation the workstock advances over the first locating device until the portion of the workstock which has just been blanked out by the punch is above the first locating device, at which time the first locating device rises to again block the advancing workstock and to initially locate it in the first position for the next punching operation.
Inventors
- 👤 William J Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:28
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/04; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/461; Y10T83/566; Y10T83/5815; Y10T83/5842; Y10T83/5851
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
295 words
A workstop for use with a punch press having a ram and a die to position advancing workstock inserted therein to be operated upon by a punch, which comprises: a first workstock locating device slidably mounted in the die for movement above and below the workstock engaging surface of the die; a spring for normally urging the first locating device to an aspect above the workstock engaging surface of the die to engage and to locate the advancing workstock in a first position; a second workstock locating device mounted to the ram for movement therewith, and arranged for engagement with the first locating device, prior to operation of the punch upon the workstock, to depress the first locating device below the surface of the advancing workstock and out of engagement with the advancing workstock, and to set the workstock in a second position prior to operation of the punch upon the workstock, said second workstock locating device having a workstock engaging surface offset, in the normal direction of advance of the workstock, with respect to the workstock engaging surface of the first locating device such that, when the first locating device is depressed below the surface of the workstock by the second locating device, the workstock will advance over the top surface of the first locating device and into engagement with the second locating device; and a chamfered surface on said first locating device opposite its surface which normally engages the advancing workstock, with a slope so that if the workstock is moved in a direction which is opposite the direction that it normally advances, the first workstock locating device will be cammed out of blocking engagement with the workstock, said spring proportioned for yielding to a force moving said workstock in said opposite direction.
Claim 2
Dependent Claim
295 words
A workstop for use with a punch press having a ram and a die to position advancing workstock inserted therein to be operated upon by a punch, which comprises: a first workstock locating device slidably mounted in the die for movement above and below the workstock engaging surface of the die; a spring for normally urging the first locating device to an aspect above the workstock engaging surface of the die to engage and to locate the advancing workstock in a first position; a second workstock locating device mounted to the ram for movement therewith, and arranged for engagement with the first locating device, prior to operation of the punch upon the workstock, to depress the first locating device below the surface of the advancing workstock and out of engagement with the advancing workstock, and to set the workstock in a second position prior to operation of the punch upon the workstock, said second workstock locating device having a workstock engaging surface offset, in the normal direction of advance of the workstock, with respect to the workstock engaging surface of the first locating device such that, when the first locating device is depressed below the surface of the workstock by the second locating device, the workstock will advance over the top surface of the first locating device and into engagement with the second locating device; and a chamfered surface on said first locating device opposite its surface which normally engages the advancing workstock, with a slope so that if the workstock is moved in a direction which is opposite the direction that it normally advances, the first workstock locating device will be cammed out of blocking engagement with the workstock, said spring proportioned for yielding to a force moving said workstock in said opposite direction.
Claim 3
Dependent Claim
189 words
A workstock for use with a punch press having a ram and a die and adapted for positioning an advancing workstock inserted therein to be operated upon by a punch, the workstock comprising: a first locating device mounted for movement in said die between positions above and below the workstock engaging surface of said die; a first spring arranged relative to the die for urging the first locating device above the workstock engaging surface of the die to engage and to locate an advancing workstock in a first position; a second locating device mounted for movement relative to the ram and in alignment with said first locating device, movement of said second locating device being responsive to operation of the punch to locate an advancing workstock in a second position; and a second spring arranged for movement with tHe ram and urging said second locating device into the path of the advancing workstock, said springs proportioned such that said first spring yields to permit said first locating device to move out of the path of movement of the workstock as said second locating device moves toward its locating position.
Claim 4
Dependent Claim
189 words
A workstock for use with a punch press having a ram and a die and adapted for positioning an advancing workstock inserted therein to be operated upon by a punch, the workstock comprising: a first locating device mounted for movement in said die between positions above and below the workstock engaging surface of said die; a first spring arranged relative to the die for urging the first locating device above the workstock engaging surface of the die to engage and to locate an advancing workstock in a first position; a second locating device mounted for movement relative to the ram and in alignment with said first locating device, movement of said second locating device being responsive to operation of the punch to locate an advancing workstock in a second position; and a second spring arranged for movement with tHe ram and urging said second locating device into the path of the advancing workstock, said springs proportioned such that said first spring yields to permit said first locating device to move out of the path of movement of the workstock as said second locating device moves toward its locating position.
Claim 5
Dependent Claim
61 words
A workstock according to claim 2 wherein said ram comprises a punch holder and a yieldable pressure plate biased into spaced relationship with said punch holder, and said second locating device is reciprocative through said plate, the workstock further characterized in that a boss engaging said pressure plate limits movement of said second locating means under urging of said second spring.
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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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |