US4372677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision planar positioning device
Assignee: CNA Holdings LLC
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Filing: 1981-11-23
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Granted: 1983-02-08
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Expires: 2001-11-23
Abstract
Abstract A device for the precision positioning of substantially planar materials, especially for use in the lithographic arts. In particular, photographic masks are precisely located for superimposition on photosensitive films or lithographic printing plates held within the frame of a plate making machine.
Inventors
- 👤 Ellwood J. Horner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:43
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/6242
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
A device for precision planar positioning which comprises: (a) a generally planar frame; and (b) a cursor; and (c) means for translating said cursor across the face of said planar frame and fixing said cursor at any of a plurality of positions; and (d) a planar indicator strip removably fixed along each of two adjacent perpendicular edges of said frame, each strip bearing at least one facial indicia having a substantially different optical density from said strip; and (e) at least one optical interruptor means, cooperating with said translating means, capable of differentiating between the optical density of said strips and said indicia and having means for indicating a difference in optical density between said strips and said indicia.
Claim 2
Independent Claim
119 words
A device for precision planar positioning which comprises: (a) a generally planar frame; and (b) a cursor; and (c) means for translating said cursor across the face of said planar frame and fixing said cursor at any of a plurality of positions; and (d) a planar indicator strip removably fixed along each of two adjacent perpendicular edges of said frame, each strip bearing at least one facial indicia having a substantially different optical density from said strip; and (e) at least one optical interruptor means, cooperating with said translating means, capable of differentiating between the optical density of said strips and said indicia and having means for indicating a difference in optical density between said strips and said indicia.
Claim 3
Dependent Claim
145 words
A photographic element exposing device comprising: (a) a photographic element support; and (b) a carrier support for a photomask movable in a plane substantially spaced from and parallel to said photographic element support; and (c) means for adjusting the position of said carrier support with respect to said element support; and (d) means for indicating the adjustment of said negative carrier support to a pre-determined location comprising: (i) a planar indicator strip removably fixed along each of two adjacent perpendicular edges of said photographic element support, each strip bearing at least one facial indicia having a substantially different optical density from said strip; and (ii) at least one optical interruptor means, cooperating with said adjusting means, capable of differentiating between the optical density of said strips and said indicia and having means for indicating a difference in optical density between said strips and said indicia.
Claim 4
Dependent Claim
145 words
A photographic element exposing device comprising: (a) a photographic element support; and (b) a carrier support for a photomask movable in a plane substantially spaced from and parallel to said photographic element support; and (c) means for adjusting the position of said carrier support with respect to said element support; and (d) means for indicating the adjustment of said negative carrier support to a pre-determined location comprising: (i) a planar indicator strip removably fixed along each of two adjacent perpendicular edges of said photographic element support, each strip bearing at least one facial indicia having a substantially different optical density from said strip; and (ii) at least one optical interruptor means, cooperating with said adjusting means, capable of differentiating between the optical density of said strips and said indicia and having means for indicating a difference in optical density between said strips and said indicia.
Claim 5
Dependent Claim
50 words
The device of claim 1 or 2 wherein said optical interruptor means comprises a light source and a light receptor spaced from said source which is capable of receiving light from said source, said light receptor being capable of signalling the presence or absence of light reception from said source.
Claim 6
Dependent Claim
15 words
The device of claim 3 wherein said signal is capable of triggering an indicator display.
Claim 7
Dependent Claim
12 words
The device of claim 4 wherein said indicator display is a lamp.
Claim 8
Dependent Claim
12 words
The device of claim 3 wherein said optical interruptor means is monolithic.
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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) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |