US3921181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compliant printer blade for facsimile printer
Assignee: Telautograph Corp
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Filing: 1974-03-11
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Granted: 1975-11-18
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Expires: 1994-03-11
Abstract
Abstract An improved printing blade for a facsimile printer of the drum type is made out of a thin strip of stainless steel. The blade is inserted into a rigid blade carrier and locked firmly in place by a spring-biased eccentric locking roller. The carrier is mounted on the printer in such a position as to cause the edge of the blade to bear against web material over a helical wire on the printer drum with sufficient force to maintain the blade against the web material. The inherent resilience of the blade is sufficient to compensate for any differences in the radius of the helical wire from the axis of the turning drum and differences in the thicknesses of web material being passed between the drum and the blade.
Inventors
- 👤 Frank W Hauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:03
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/12; H04N1/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
224 words
An improved printing blade apparatus for use in a facsimile printer having a rotating drum with a helical conducting wire on the surface thereof for printing on an electrolytic web that moves over said drum in a direction perpendicular to the axis of rotation of said drum, said web passing between a blade parallel to said axis and said drum, said apparatus comprIsing a thin planar strip of metal held along one longitudinal end in a position to serve as said blade with an edge opposite said one end against said web, and a rigid carriage means for holding said thin planar strip of metal along said one end with said opposite edge against said web and with said planar strip inclined at an acute angle with said web, said angle being selected for said opposite edge to point in the direction of motion of said web wherein said carriage means includes biasing means for adjusting the position of said thin planar strip against said web with a desired pressing force of said strip against said web to maintain said strip against said web as said drum rotates, whereby localized compliance of said strip is provided to allow for deviations in the diameter of said wire and distance of said wire from said drum axis, and for variations in the thickness of said web.
Claim 2
Dependent Claim
224 words
An improved printing blade apparatus for use in a facsimile printer having a rotating drum with a helical conducting wire on the surface thereof for printing on an electrolytic web that moves over said drum in a direction perpendicular to the axis of rotation of said drum, said web passing between a blade parallel to said axis and said drum, said apparatus comprIsing a thin planar strip of metal held along one longitudinal end in a position to serve as said blade with an edge opposite said one end against said web, and a rigid carriage means for holding said thin planar strip of metal along said one end with said opposite edge against said web and with said planar strip inclined at an acute angle with said web, said angle being selected for said opposite edge to point in the direction of motion of said web wherein said carriage means includes biasing means for adjusting the position of said thin planar strip against said web with a desired pressing force of said strip against said web to maintain said strip against said web as said drum rotates, whereby localized compliance of said strip is provided to allow for deviations in the diameter of said wire and distance of said wire from said drum axis, and for variations in the thickness of said web.
Claim 3
Dependent Claim
111 words
Apparatus as defined in claim 1 wherein said carriage is comprised of an elongated block having a longitudinal flat surface inclined at said angle, said flat surface being in front of said planar strip in respect to the direction of rotation of said drum, and a spring-biased eccentric roller bearing against said surface, whereby said roller may be rotated away from said surface to insert said thin planar strip between said roller and said surface, and then released to hold said strip in place with the curved surface of said roller behind said strip in respect to the direction of rotation of said drum to enhance said compliance of said strip.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |