US3756109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic feed apparatus for encapsulated semiconductor units
Assignee: Motorola Solutions Inc
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Filing: 1971-07-01
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Granted: 1973-09-04
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Expires: 1991-07-01
Abstract
Abstract A helical screw conveyor is provided for moving strips of concatenate semiconductor units past various work stations. The helical screw conveyor is preferably driven by a one revolution clutch so as to move the strips in a step by step manner.
Inventors
- 👤 J Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:37
CPC Classifications
B; B23; B23Q; B23Q7/00; B23Q7/14; B23Q7/1426; B23Q7/1463; B23Q7/1473; B65; B65G; B65G35/00; B65G35/06; Y; Y10; Y10S; Y10S83/00; Y10S83/914; Y10T; Y10T83/00; Y10T83/444; Y10T83/4577; Y10T83/463; Y10T83/4635; Y10T83/647; Y10T83/6476; Y10T83/654; Y10T83/658
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
Apparatus for manufacturing semiconductor units comprising a plurality of work stations for performing manufacturing operations upon a concatenation of semiconductor units each of which have an index notch at an edge thereof defining a periodic length for the units; and means for feeding said units past said work stations by engagement with said notch including a helical screw directly engaging said notch and having a pitch equal to said periodic length of the units and means for rotating said helical screw.
Claim 2
Dependent Claim
81 words
Apparatus for manufacturing semiconductor units comprising a plurality of work stations for performing manufacturing operations upon a concatenation of semiconductor units each of which have an index notch at an edge thereof defining a periodic length for the units; and means for feeding said units past said work stations by engagement with said notch including a helical screw directly engaging said notch and having a pitch equal to said periodic length of the units and means for rotating said helical screw.
Claim 3
Dependent Claim
19 words
Apparatus as defined in claim 1 wherein said means for rotating said helical screw comprises a one revolution clutch.
Claim 4
Dependent Claim
37 words
Apparatus as defined in claim 1 wherein said work stations are mounted on a punch press and each of said work stations is a tool pair for performing progressive punching operations upon portions of said semiconductor units.
Claim 5
Dependent Claim
89 words
Apparatus as defined in Claim 3 wherein said concatenation of semiconductor units comprise a plastic encapsulated integrated circuit unit having a lead frame and plastic encapsulating flash material to be removed; and wherein a first work station comprises punch means for removing the flash from said lead frame, a second station comprises punch means for removing intermediate portions of said lead frame and a third work station comprises a shearing punch for cutting support means which retains the plastic encapsulated unit within the lead frame thereby removing the latter.
References Cited (Backward Citations)
GB190215345A
Cited
US1504419A
Cited
US2040023A
Cited
US2259748A
Cited
US2906238A
Cited
US3116658A
Cited
US3374605A
Cited
US3525151A
Cited
US3570342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |