US4735144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doctor blade and holder for metering system
Assignee: STORK CELLRAMIC Inc A CORP OF
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Filing: 1986-05-21
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Granted: 1988-04-05
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Expires: 2006-05-21
Abstract
Abstract An ink metering system for a rotating ink roll having a shaft journalled in the frame of a inking system includes two doctor blades and a mechanism for supporting the doctor blades on the shaft of the ink roll so that the doctor blades contact the ink roll under uniform pressure independent of movement between the ink roll and the frame. The arrangement also includes a mechanism for adjusting the pressure of the doctor blades and for sealing the system. The doctor blade is composed of polytetrafluoroethylene-polyphenylene sulfide ceramic resin containing graphite fibers. The doctor blade includes a number of laminated sheets of this material in which a majority of the sheets include fibers oriented in the machine direction and at least one sheet includes fibers oriented perpendicular to the machine direction.
Inventors
- 👤 Jerome D. Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:55
CPC Classifications
B; B41; B41F; B41F31/00; B41F31/02; B41F31/027; B41F31/04; B41F31/20
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
167 words
An ink metering system for a rotating ink roll having a shaft journalled in the frame of an inking system, the ink metering system comprising: a first doctor blade; means for supporting the first doctor blade on the shaft of the ink roll so that the first doctor blade contacts the ink roll at a uniform pressure independent of relative movement between the ink roll and the frame, the supporting means including inner bearing elements mounted on and sealed to the shaft at each end of the ink roll to rotate with the shaft and outer bearing elements paired with, rotatable relative to, and sealed to the inner bearing elements; and means for contacting the ink roll at a position spaced from the first doctor blade, the contacting means supported by the supporting means, wherein the first doctor blade, the contacting means, and the supporting means form housing means surrounding a portion of the ink roll for containing ink between the housing means and the ink roll.
Claim 2
Dependent Claim
167 words
An ink metering system for a rotating ink roll having a shaft journalled in the frame of an inking system, the ink metering system comprising: a first doctor blade; means for supporting the first doctor blade on the shaft of the ink roll so that the first doctor blade contacts the ink roll at a uniform pressure independent of relative movement between the ink roll and the frame, the supporting means including inner bearing elements mounted on and sealed to the shaft at each end of the ink roll to rotate with the shaft and outer bearing elements paired with, rotatable relative to, and sealed to the inner bearing elements; and means for contacting the ink roll at a position spaced from the first doctor blade, the contacting means supported by the supporting means, wherein the first doctor blade, the contacting means, and the supporting means form housing means surrounding a portion of the ink roll for containing ink between the housing means and the ink roll.
Claim 3
Dependent Claim
14 words
The system of claim 1 wherein the contacting means is a second doctor blade.
Claim 4
Dependent Claim
31 words
The system of claim 1 wherein the first doctor blade is mounted at an angle of about 30° from a tangent line of the ink roll in the direction of rotation.
Claim 5
Independent Claim
30 words
The system of claim, 2 wherein the second doctor blade is mounted at an angle of about 30° from a tangent line of the roll opposite the direction of rotation.
Claim 6
Dependent Claim
20 words
The system of claim 1 including face seal means for sealing each pair of inner and outer bearing elements together.
Claim 7
Dependent Claim
46 words
The system of claim 5 wherein each face seal means is interposed and held in place on one face by an axial end of the ink roll and on the other face by an axial portion of a pair of the inner and outer bearing elements.
Claim 8
Dependent Claim
21 words
The system of claim 1 wherein the supporting means includes a compressible member mounted between the doctor blade and the shaft.
Claim 9
Dependent Claim
35 words
The system of claim 1 wherein the supporting means includes an outer shell on which the first doctor blade is mounted and a compressible member mounted between the outer shell and the outer bearing elements.
Claim 10
Dependent Claim
20 words
The system of claim 7 including means for adjusting the pressure of the first doctor blade against the ink roll.
Claim 11
Dependent Claim
20 words
The system of claim 8 including means for adjusting the pressure of the first doctor blade against the ink roll.
Claim 12
Dependent Claim
82 words
The system of claim 10 wherein the adjusting means includes a pair of screws, each screw having one end anchored in a respective outer bearing elements, an intermediate portion of the screw passing through the compressible member and the outer shell; and an adjustment knob means mounted on the other end of the screw and rotatable for varying the pressure of the first doctor blade against the ink roll by varying the pressure exerted against the outer shell by the adjustment knob.
Claim 13
Dependent Claim
17 words
The system of claim 11 including a spherical bearing between each adjustment knob and the outer shell.
Claim 14
Dependent Claim
32 words
The system of claim 12 including wherein each spherical bearing includes a spherical bearing plate positioned against the outer shell and a spring between each adjustment knob and respective spherical bearing plate.
Claim 15
Dependent Claim
24 words
The system of claim 1 including vacuum manifold means proximate to and upstream of the location where the contacting means contacts the ink roll.
Claim 16
Dependent Claim
20 words
The system of claim 1 wherein the first doctor blade and supporting means is coated with a high release material.
Claim 17
Dependent Claim
28 words
The system of claim 1 wherein the first doctor blade is formed from a resinous material containing fibers oriented substantially orthogonal to the shaft of the ink roll.
Claim 18
Dependent Claim
10 words
The system of claim 16 wherein the fibers comprise graphite.
Claim 19
Dependent Claim
12 words
The system of claim 16 wherein the resinous material comprises polytetrafluoroethylene-polyphenylene sulfide.
Claim 20
Dependent Claim
13 words
The system of claim 18 wherein the resinous material comprises a ceramic resin.
Claim 21
Dependent Claim
19 words
The system of claim 1 wherein the first doctor blade comprises a plurality of laminated sheets of resinous material.
Claim 22
Dependent Claim
24 words
The system of claim 20 wherein at least one of the sheets includes fibers oriented substantially orthogonal to the shaft of the ink roll.
Claim 23
Dependent Claim
23 words
The system of claim 21 wherein a majority of the sheets includes fibers oriented substantially orthogonal to the shaft of the ink roll.
Claim 24
Dependent Claim
22 words
The system of claim 22 wherein at least one sheet includes fibers oriented substantially parallel to the shaft of the ink roll.
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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) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |