US3703281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feeding apparatus having gripper control, for use with printing machines
Assignee: MAN AG
•
Filing: 1971-08-12
•
Granted: 1972-11-21
•
Expires: 1991-08-12
Abstract
Abstract The grippers on a sheet feeding apparatus from a printing machine are controlled by having a follower contacting the leading cam formed as a parallelogram - shiftable track, suspended on leading and trailing swing arms of equal length, having one end each pivotable about leading and trailing points, the shiftable track being arranged at shallow angle with respect to the center of the chain conveyer; and a trailing cam, formed as a swingable segmental-like element swinging about a pivot point and having a leading edge thereof located approximately in the prolongation of a line connecting the pivot point thereof and the suspension point of the trailing swing arm of the shiftable track. The trailing cam means being formed to have a leading edge outline which matches substantially with the trailing edge outline of the leading cam, so that the gripper control follower will be smoothly engaged by both leading and trailing cams to release sheets carried by the grippers, and the release position is readily adjustable for various sizes of printed material.
Inventors
- 👤 Oskar Liebert
- 👤 Klaus Theilacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:45
CPC Classifications
B; B65; B65H; B65H29/00; B65H29/02; B65H29/04; B65H29/041; B65H29/045; B65H29/047; B65H2701/00; B65H2701/10; B65H2701/17; B65H2701/176
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
177 words
In a sheet transport apparatus having a chain conveyor (2), gripper means (3, 4) secured to the chain conveyor, control means for said grippers and a follower (5) adapted to be contacted by said control means, said control means comprising leading cam means (6) being formed as a parallelogram-shiftable track (6'') and leading and trailing swing arms (8,9) suspending said shiftable track (6''), said swing arms being of equal length and having one end each pivotable about leading and trailing points (14'', 12), the shiftable track being arranged at a shallow angle with respect to the center line of the chain conveyor (2); and trailing cam means (7) formed as a swingable segmental-like element swinging about a pivot point (12) and having a leading edge thereof located approximately in the prolongation of a line connecting said pivot point thereof (12) and the suspension point (14) of the trailing swingable arm with the shiftable track (6''); the trailing cam means (7) being formed to have an outline merging smoothly with the outline of the leading cam means (6).
Claim 2
Dependent Claim
177 words
In a sheet transport apparatus having a chain conveyor (2), gripper means (3, 4) secured to the chain conveyor, control means for said grippers and a follower (5) adapted to be contacted by said control means, said control means comprising leading cam means (6) being formed as a parallelogram-shiftable track (6'') and leading and trailing swing arms (8,9) suspending said shiftable track (6''), said swing arms being of equal length and having one end each pivotable about leading and trailing points (14'', 12), the shiftable track being arranged at a shallow angle with respect to the center line of the chain conveyor (2); and trailing cam means (7) formed as a swingable segmental-like element swinging about a pivot point (12) and having a leading edge thereof located approximately in the prolongation of a line connecting said pivot point thereof (12) and the suspension point (14) of the trailing swingable arm with the shiftable track (6''); the trailing cam means (7) being formed to have an outline merging smoothly with the outline of the leading cam means (6).
Claim 3
Dependent Claim
177 words
In a sheet transport apparatus having a chain conveyor (2), gripper means (3, 4) secured to the chain conveyor, control means for said grippers and a follower (5) adapted to be contacted by said control means, said control means comprising leading cam means (6) being formed as a parallelogram-shiftable track (6'') and leading and trailing swing arms (8,9) suspending said shiftable track (6''), said swing arms being of equal length and having one end each pivotable about leading and trailing points (14'', 12), the shiftable track being arranged at a shallow angle with respect to the center line of the chain conveyor (2); and trailing cam means (7) formed as a swingable segmental-like element swinging about a pivot point (12) and having a leading edge thereof located approximately in the prolongation of a line connecting said pivot point thereof (12) and the suspension point (14) of the trailing swingable arm with the shiftable track (6''); the trailing cam means (7) being formed to have an outline merging smoothly with the outline of the leading cam means (6).
Claim 4
Dependent Claim
177 words
In a sheet transport apparatus having a chain conveyor (2), gripper means (3, 4) secured to the chain conveyor, control means for said grippers and a follower (5) adapted to be contacted by said control means, said control means comprising leading cam means (6) being formed as a parallelogram-shiftable track (6'') and leading and trailing swing arms (8,9) suspending said shiftable track (6''), said swing arms being of equal length and having one end each pivotable about leading and trailing points (14'', 12), the shiftable track being arranged at a shallow angle with respect to the center line of the chain conveyor (2); and trailing cam means (7) formed as a swingable segmental-like element swinging about a pivot point (12) and having a leading edge thereof located approximately in the prolongation of a line connecting said pivot point thereof (12) and the suspension point (14) of the trailing swingable arm with the shiftable track (6''); the trailing cam means (7) being formed to have an outline merging smoothly with the outline of the leading cam means (6).
Claim 5
Dependent Claim
45 words
Apparatus according to claim 1 wherein the segmental-like element of the trailing cam means has a control edge which is eccentric with respect to its pivot point (12) the radial distance of the trailing cam means decreasing in direction of movement of the follower (5).
Claim 6
Dependent Claim
41 words
Apparatus according to claim 1 wherein the leading cam means (6) partly overlap the trailing cam means (7), to form a combined camming surface (15), the combined camming surface having a lesser radius than the radius of the trailing cam means.
Claim 7
Dependent Claim
36 words
Apparatus according to claim 1 wherein said swing arms are formed as double arm cranks (8, 9); and adjustment means (11) engaging one of said cranks at the end thereof not connected to the shiftable track.
Claim 8
Dependent Claim
32 words
Apparatus according to claim 4 wherein the adjustment means comprises a control rod (11) connected to one of said cranks, said control rod being shiftable in position in dependence on machine speed.
Claim 9
Dependent Claim
39 words
Apparatus according to claim 4 wherein the adjustment means comprises a control rod (11) connected to one of said cranks; and means (31) sensing machine speed and connected to shift said control rod in dependence on sensed machine speed.
Claim 10
Dependent Claim
26 words
Apparatus according to claim 4 wherein one of the crank arms (10) is formed with limit means (17, 18) to limit the extent of movement thereof.
Claim 11
Dependent Claim
16 words
Apparatus according to claim 7 wherein said limit means comprises a pin engaging an elongated slot.
Claim 12
Dependent Claim
17 words
Apparatus according to claim 1 wherein the angle of swing of said swing arms is about 40*.
Claim 13
Dependent Claim
19 words
Apparatus according to claim 1 wherein the shiftable track and the trailing cam means are formed as interdigited elements.
Claim 14
Dependent Claim
29 words
Apparatus according to claim 1 wherein the pivot point (12) of the trailing swing arm (8) and the pivot point (12) of the trailing cam means (7) are coaxial.
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |