Patent US3668762A successfully refreshed from Google Patents.
US3668762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of artwork masters
Assignee: Individual
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Filing: 1970-10-13
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Granted: 1972-06-13
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Expires: 1990-10-13
Abstract
Abstract There is provided apparatus and method for the preparation of artwork masters used for the manufacture of printed circuit boards. A grid having uniformly spaced perforations onto which a work sheet for the master is applied is used for proper alignment of pressure sensitive pads on the sheet, the pads being applied by a spiked tool adapted to be centered in and by the perforations and press the pads against the sheet. There is also provided a dispenser and running ''''conductor'''' lines between spaced pads on the work sheet.
Inventors
- 👤 Alfred Charles Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:01
CPC Classifications
H; H05; H05K; H05K13/00; H05K3/00; H05K3/0002; H05K1/00; H05K1/02; H05K1/11; H05K1/115; H05K1/116; H05K2203/00; H05K2203/05; H05K2203/0548; H05K2203/056; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/1056; Y10T156/12; Y10T156/1304; Y10T156/1313; Y10T29/00; Y10T29/53; Y10T29/53678; Y10T29/53909; Y10T29/53913
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
Apparatus for use in the accurate positioning of annular pads on a base sheet in the production of printed circuit artwork masters which comprises: a. a pad applicator comprising a shaft retained in slidable relation by a housing, said shaft having a tapered pointed end and projecting from said housing and adapted to penetrate said base sheet and further adapted to receive and retain an annular pad, said housing providing means surrounding said shaft for pressing an annular pad against the base sheet; and b. a perforated grid adapted to receive said base sheet in overlying relation, the perforations of said grid adapted to receive and center the tapered end of said shaft.
Claim 2
Dependent Claim
113 words
Apparatus for use in the accurate positioning of annular pads on a base sheet in the production of printed circuit artwork masters which comprises: a. a pad applicator comprising a shaft retained in slidable relation by a housing, said shaft having a tapered pointed end and projecting from said housing and adapted to penetrate said base sheet and further adapted to receive and retain an annular pad, said housing providing means surrounding said shaft for pressing an annular pad against the base sheet; and b. a perforated grid adapted to receive said base sheet in overlying relation, the perforations of said grid adapted to receive and center the tapered end of said shaft.
Claim 3
Dependent Claim
37 words
Apparatus as claimed in claim 1 in which the perforations of the grid center the tapered end of said shaft when an annular pad contained on the taper of said shaft is flush with the base sheet.
Claim 4
Dependent Claim
16 words
Apparatus as claimed in claim 1 in which the shaft is spring biased within said housing.
Claim 5
Dependent Claim
19 words
Apparatus as claimed in claim 3 in which the tapered end of said shaft is of right conical form.
Claim 6
Dependent Claim
25 words
Apparatus as claimed in claim 1 in which the perforated grid is supported by a backing adapted to receive the tapered end of said shaft.
Claim 7
Dependent Claim
14 words
Apparatus as claimed in claim 5 in which the backing is a foamed plastic.
Claim 8
Dependent Claim
37 words
Apparatus as claimed in claim 5 in which the thickness of the foamed plastic backing exceeds the axial length of the tapered portion of the shaft and is contained between the perforated grid and a backing board.
References Cited (Backward Citations)
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Cited
US2970370A
Cited
US3037265A
Cited
US2990310A
Cited
US3307244A
Cited
US3346950A
Cited
US3613232A
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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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |