US3854162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doctor blade holder
Assignee: Bird Machine Co Inc
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Filing: 1973-03-02
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Granted: 1974-12-17
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Expires: 1993-03-02
Abstract
Abstract A doctor blade holder has a pair of holder members which retain the back edge of a doctor blade between them, one member exerting resilient pressure on the blade to urge it toward the other member through a resilient yieldable strip mounted thereon, the arrangement providing desirable flexibility for the blade and also providing sealing.
Inventors
- 👤 R Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:52
CPC Classifications
D; D21; D21G; D21G3/00; D21G3/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
A holder for a doctor blade for doctoring rolls and the like comprising: a pair of holder members constructed and arranged to be secured together to a support adjacent one of their longitudinal edges with their opposite edges free for receiving and retaining the back portion of a doctor blade between them with its doctoring edge projected beyond them and with one member resiliently urged toward the other member to exert sufficient pressure on said blade to hold it in operative position against the other member; said one member being formed of resilient metal and being arranged to be fastened to the other said member adjacent their edges remote from the doctoring edge of a said blade received between them so that the other edge of said one member is flexible toward and away from the other said member; said one member having mounted thereon adjacent said other edge thereof a resilient, yieldable strip material extending longitudinally of said member and blade and positioned so that said one member exerts said pressure on said blade through said material, said material being deformable under said pressure; and means to secure said holder members to a said support with said other member preceding said one member in the direction of rotation of the surface to be doctored.
Claim 2
Dependent Claim
215 words
A holder for a doctor blade for doctoring rolls and the like comprising: a pair of holder members constructed and arranged to be secured together to a support adjacent one of their longitudinal edges with their opposite edges free for receiving and retaining the back portion of a doctor blade between them with its doctoring edge projected beyond them and with one member resiliently urged toward the other member to exert sufficient pressure on said blade to hold it in operative position against the other member; said one member being formed of resilient metal and being arranged to be fastened to the other said member adjacent their edges remote from the doctoring edge of a said blade received between them so that the other edge of said one member is flexible toward and away from the other said member; said one member having mounted thereon adjacent said other edge thereof a resilient, yieldable strip material extending longitudinally of said member and blade and positioned so that said one member exerts said pressure on said blade through said material, said material being deformable under said pressure; and means to secure said holder members to a said support with said other member preceding said one member in the direction of rotation of the surface to be doctored.
Claim 3
Dependent Claim
39 words
A holder according to claim 1 wherein said one member is spaced sufficiently from the other member to permit the blade to pivot on said strip so that its back edge is movable toward and away from each member.
Claim 4
Dependent Claim
27 words
A holder according to claim 1 wherein the blade engaging surface of said strip material has a lower coefficient of friction than the blade surface engaged thereby.
Claim 5
Dependent Claim
57 words
A holder according to claim 1 wherein said other edge of said one member is bent to extend toward a said blade received between said members with its edge adjacent said blade, and said strip material has a longitudinal slot therein into which said other edge of said one member is received to mount said material thereon.
Claim 6
Dependent Claim
36 words
A holder according to claim 1 wherein said doctor blade is provided with lugs projecting toward said one member when said blade is received between said members and contiguous to the rear face 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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |