US3800697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated printing screen construction
Assignee: Individual
•
Filing: 1972-04-28
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Granted: 1974-04-02
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Expires: 1992-04-28
Abstract
Abstract A printing screen construction to be electrically heated and formed of a metallic frame defined by two opposed side members and two opposed end members, the construction including a metallic printing screen extending across the frame over the lower edges of the members with electrical insulating material interposed between the screen and the frame. One side member of the frame is an angular element having a vertical flange and a horizontal flange, the latter projecting horizontally outwardly away from the top edge of the vertical flange. A strip fastener is electrically insulatingly connected to one side edge of the screen, the fastener having a generally U-shaped cross-section and being applied over the outer edge of the horizontal flange with one leg lying flat over the top surface of the horizontal flange and with the other leg being inclined with respect to the top surface and extending toward the said one side edge of the screen. The other edges of the screen are electrically insulatingly secured to the frame and the screen is connected to an electrical circuit.
Inventors
- 👤 C Sulivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:51
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
An electrically heated printIng screen construction comprising: a. a metallic frame defined by two opposed side members and two opposed end members each having upper and lower edges; b. a metallic printing screen having end and side edges extending across the frame over the lower edges of said members; c. electrical insulating material interposed between said screen and said frame; d. wherein at least one side member of said frame is an angular element having a vertical flange and a horizontal flange, the latter projecting horizontally outwardly away from the upper edge of said vertical flange; e. a strip fastener electrically insulatingly connected to one of said side edges of said screen corresponding to said one side member, said fastener having a generally U-shaped crosssection and being applied over the outer edge of said horizontal flange with one leg thereof lying flat over the top surface of said horizontal flange and the other leg being inclined downwardly and inwardly toward the lower edge of said one side member and extending colinearly with the said side edge of said screen; f. means electrically insulatingly securing the other edges of said screen to said frame; and g. means to connect said screen to an electrical circuit electrically insulatingly from said frame whereby only said screen is heated.
Claim 2
Dependent Claim
215 words
An electrically heated printIng screen construction comprising: a. a metallic frame defined by two opposed side members and two opposed end members each having upper and lower edges; b. a metallic printing screen having end and side edges extending across the frame over the lower edges of said members; c. electrical insulating material interposed between said screen and said frame; d. wherein at least one side member of said frame is an angular element having a vertical flange and a horizontal flange, the latter projecting horizontally outwardly away from the upper edge of said vertical flange; e. a strip fastener electrically insulatingly connected to one of said side edges of said screen corresponding to said one side member, said fastener having a generally U-shaped crosssection and being applied over the outer edge of said horizontal flange with one leg thereof lying flat over the top surface of said horizontal flange and the other leg being inclined downwardly and inwardly toward the lower edge of said one side member and extending colinearly with the said side edge of said screen; f. means electrically insulatingly securing the other edges of said screen to said frame; and g. means to connect said screen to an electrical circuit electrically insulatingly from said frame whereby only said screen is heated.
Claim 3
Dependent Claim
121 words
A construction as claimed in claim 1, wherein the other side member of said frame is likewise an angular member having a vertical flange and a horizontal flange, the latter projecting horizontally outwardly away from the top edge of said vertical flange and wherein said securing means in f) includes a second strip fastener electrically insulatingly connected to the other side edge of said screen, said fastener having a generally U-shaped cross-section and being applied over the outer edge of said horizontal flange with one leg thereof lying flat over the top surface of said horizontal flange and the other leg being inclined with respect to said top surface and extending in alignment with the said side edge of said screen.
Claim 4
Dependent Claim
59 words
A construction as claimed in claim 1, wherein the other side member of said frame is a flat vertical bar and wherein said securing means in f) includes a second U-shaped strip fastener electrically insulatingly connected to the side edge of said screen corresponding to said flat bar, said second strip fastener straddling the upper edge of said bar.
Claim 5
Dependent Claim
116 words
A construction as claimed in claim 2, wherein said end members are angular elements each having a vertical flange and an outwardly projecting horizontal flange extending from the top edge of said vertical flange and wherein said securing means in f ) of claim 1 further comprises: dowels made of electrically insulating material fastened to and extending across said horizontal flanges, each dowel having a central through aperture and there being at least one dowel per horizontal flange, and screws extending through holes in the end edges of said screen, with the heads of said screws applied against said end edges, to hold said screen tight across said frame, said screws being fixed to said dowels.
Claim 6
Dependent Claim
24 words
A construction claimed in claim 4, wherein said dowel apertures are threaded and said screws are fixed thereto by being threaded into said apertures.
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |