US4120244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gripper movement changeover device on a sheet-turning drum for perfector printing machines
Assignee: Heidelberger Druckmaschinen AG
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Filing: 1977-02-07
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Granted: 1978-10-17
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Expires: 1997-02-07
Abstract
Abstract Gripper movement changeover device on a sheet-turning drum for perfector printing machines having drive members for the gripper movement pivotable about pivot pins, each of the drive members carrying a roller selectively engageable with coaxially disposed control cams for following the same, includes a bridge disposed in a cavity formed in the sheet-turning drum, the bridge extending over the length of the sheet-turning drum, the drive members being mounted in the bridge, the bridge being longitudinally displaceable a distance corresponding to the mutual spacing of the control cams of the respective drive members.
Inventors
- 👤 Arno Wirz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:35
CPC Classifications
B; B41; B41F; B41F21/00; B41F21/10; B41F21/106; B41F21/108; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
171 words
Gripper movement changeover device on a sheet-turning drum for perfector printing machines having two drive members for the gripper movement located at opposite ends of the drum, the drive members being pivotable about pivot pins, each of the drive members carrying a roller selectively engageable with either one of two coaxially disposed control cams located adjacent the ends of the drum for following the cams comprising a bridge disposed in a cavity formed in the sheet-turning drum, said bridge extending over the length of the sheet-turning drum, a plate fastened in said cavity and formed with a slot, an eccentric bolt mounted in said bridge and having an eccentric pin engaging in the slot formed in said plate, the drive members being movably mounted on said bridge for displacement together with said bridge axially of the drum, whereby upon rotation of said eccentric bolt against said slot, said bridge is caused to be longitudinally displaced a distance corresponding to the mutual spacing of the control cams of the respective drive members.
Claim 2
Dependent Claim
171 words
Gripper movement changeover device on a sheet-turning drum for perfector printing machines having two drive members for the gripper movement located at opposite ends of the drum, the drive members being pivotable about pivot pins, each of the drive members carrying a roller selectively engageable with either one of two coaxially disposed control cams located adjacent the ends of the drum for following the cams comprising a bridge disposed in a cavity formed in the sheet-turning drum, said bridge extending over the length of the sheet-turning drum, a plate fastened in said cavity and formed with a slot, an eccentric bolt mounted in said bridge and having an eccentric pin engaging in the slot formed in said plate, the drive members being movably mounted on said bridge for displacement together with said bridge axially of the drum, whereby upon rotation of said eccentric bolt against said slot, said bridge is caused to be longitudinally displaced a distance corresponding to the mutual spacing of the control cams of the respective drive members.
Claim 3
Dependent Claim
38 words
Device according to claim 1 including axially aligned pivot means disposed in respective end faces of said bridge for mounting said drive members, and torsion bar spring means for stressing said axially aligned pivot means against one another.
Claim 4
Dependent Claim
52 words
Device according to claim 1 including a first bearing secured in said cavity, a second bearing secured to said bridge, and a threaded spindle threadedly fastened at one end thereof in said first bearing and rotatably mounted at the other end thereof in said second bearing and secured thereat against axial displacement.
Claim 5
Dependent Claim
41 words
Device according to claim 1 including slide means for slidably guiding said bridge in said cavity, eccentric bolt means for adjusting said slide means with respect to said bridge and threaded fastening means for tightly securing said bridge in said cavity.
Claim 6
Dependent Claim
36 words
Device according to claim 1 including roller means for rollably guiding said bridge in said cavity, eccentric bolt means for adjusting said roller means, and threaded fastening means for tightly securing said bridge in said cavity.
References Cited (Backward Citations)
US3095750A
Cited
US3055445A
Cited
US3145257A
Cited
US3675748A
Cited
US3796154A
Cited
US3929069A
Cited
US3985074A
Cited
DE2414998A1
Cited
US4014261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |