US3559569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damping unit for an offset printing machine
Assignee: Adamovske Strojirny AS
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Filing: 1969-02-24
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Granted: 1971-02-02
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Expires: 1989-02-24
Abstract
Abstract In a damping unit having two applicator rollers connected by a transfer roller and a distributor roller engaging only one of the applicator rollers, the bearings of the applicator rollers are guided between an inoperative and an operative position relative to the plate cylinder in converging slots of a guide bracket. The bearing of the applicator roller in direct contact with the distributor roller moves in a slot which is perpendicular to a plane through the axes of the distributor roller and of the directly engaged applicator roller when the latter is at the midpoint of its path between the operative and inoperative positions, thereby making the contact pressures between the two rollers precisely equal in the two positions.
Inventors
- 👤 Josef Jurny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:03
CPC Classifications
B; B41; B41F; B41F7/00; B41F7/20; B41F7/24; B41F7/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
311 words
In a damping unit of an offset printing machine having a support and a plate cylinder, the damping unit including two applicator rollers, a transfer roller in simultaneous rolling engagement with said applicator rollers, a distributor roller in rolling contact with only one of said applicator rollers, said cylinder and said rollers being mounted on said support for rotation about respective axes extending in a common direction, and moving means for moving said applicator rollers between an operative position of rolling engagement with a plate fastened on said cylinder and an inoperative position remote from said cylinder, the improvement which comprises: a. a bearing on each axial end of each applicator roller, the applicator rollers being journaled in said bearings for rotation about the respective axes thereof; b. guide means on said support guidingly engaging said bearings for movement of said axes in respective paths toward and away from said cylinder; c. the axis of rotation of said distributor roller being normally fixed relative to said support, a plane drawn through said fixed axis to include the same and a point bisecting the path of the axis of said one applicator roller between said operative and inoperative positions of said one applicator roller being inclined relative to the last mentioned path at an angle of 88* to 92*; d. hanger means on said support and resiliently biased to hold said transfer roller in simultaneous rolling contact with said applicator rollers in said positions of the latter and during movement of the same between said positions, each axial end of said transfer roller being journaled in a bearing, and said hanger means including a hanger member movably mounted on said support and formed with a recess movably receiving a bearing of said transfer roller; and e. said moving means moving the bearings of said applicator rollers relative to the engaged guide means.
Claim 2
Dependent Claim
311 words
In a damping unit of an offset printing machine having a support and a plate cylinder, the damping unit including two applicator rollers, a transfer roller in simultaneous rolling engagement with said applicator rollers, a distributor roller in rolling contact with only one of said applicator rollers, said cylinder and said rollers being mounted on said support for rotation about respective axes extending in a common direction, and moving means for moving said applicator rollers between an operative position of rolling engagement with a plate fastened on said cylinder and an inoperative position remote from said cylinder, the improvement which comprises: a. a bearing on each axial end of each applicator roller, the applicator rollers being journaled in said bearings for rotation about the respective axes thereof; b. guide means on said support guidingly engaging said bearings for movement of said axes in respective paths toward and away from said cylinder; c. the axis of rotation of said distributor roller being normally fixed relative to said support, a plane drawn through said fixed axis to include the same and a point bisecting the path of the axis of said one applicator roller between said operative and inoperative positions of said one applicator roller being inclined relative to the last mentioned path at an angle of 88* to 92*; d. hanger means on said support and resiliently biased to hold said transfer roller in simultaneous rolling contact with said applicator rollers in said positions of the latter and during movement of the same between said positions, each axial end of said transfer roller being journaled in a bearing, and said hanger means including a hanger member movably mounted on said support and formed with a recess movably receiving a bearing of said transfer roller; and e. said moving means moving the bearings of said applicator rollers relative to the engaged guide means.
Claim 3
Dependent Claim
49 words
In a unit as set forth in claim 1, said guide means including two guide members mounted on said support, each guide member being formed with two slots respectively receiving the bearings on corresponding axial ends of said applicator rollers in guiding engagement, said slots defining said paths respectively.
Claim 4
Dependent Claim
40 words
In a unit as set forth in claim 2, the path of at least said one applicator member being straight, and said paths converging in a direction away from said cylinder, said hanger member being pivotally mounted on said support.
Claim 5
Dependent Claim
62 words
In a unit as set forth in claim 3, said moving means including an arm pivotally mounted on said support and two Abutment members mounted on said arm in engagement with respective bearings in said two slots, the abutment members moving the engaged bearings in the associated slots when said arm pivots on said support; and control means for pivoting said arm.
Claim 6
Dependent Claim
61 words
In a unit as set forth in claim 4, said control means including a shaft journaled in said support, said arm and another arm being mounted on said shaft and extending radially from the same, said other arm carrying a cam follower, and the control means further including a cam member movably mounted on said support and engaging said cam follower.
Claim 7
Dependent Claim
70 words
In a unit as set forth in claim 4, said slots being open in a direction away from said plate cylinder, said hanger means biasing said bearings of the applicator rollers toward said cylinder in the associated slots, and said abutment members engaging said bearings in said two slots in a direction to move the same toward the open ends of the slots against the restraint of said hanger means.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |