US3740029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing sheets from stacks
Assignee: VIDOSA
•
Filing: 1972-04-19
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Granted: 1973-06-19
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Expires: 1992-04-19
Abstract
Abstract Apparatus for removing sheets from a stack of sheets includes a fixed frame and a movable frame mounted to the fixed frame, the movable frame being at least vertically movable relative to the fixed frame from a lower position adjacent a stack of sheets to an upper position. Further included is a plurality of suction grippers mounted to the movable frame for engagement with the top sheet of the stack, and a plurality of rotatable magnetic rollers mounted to the fixed frame for engaging and supporting a sheet which is raised up by the suction grippers and movable frame. A movable carrier member is provided for removing the sheet supported by the magnetic rollers, and means is provided for displacing the suction grippers relative to the movable frame to clear the sheet supported by the magnetic rollers during movement of the carrier member, so that the movable frame can be lowered past the supported sheet to engage a further sheet from the stack during removal of the supported sheet without interfering with the removal operations.
Inventors
- 👤 F Bays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:15
CPC Classifications
B; B65; B65G; B65G59/00; B65G59/02; B65G59/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
178 words
Apparatus for removing sheets from a stack of sheets, comprising: a fixed frame (1); a movable frame (2) mounted to said fixed frame (1) and being at least vertically movable relative to said fixed frame (1) from a lower position adjacent a stack of sheets (12) to an upper position; a plurality of suction grippers (7) mounted to said movable frame (2) for engagement with the top sheet (14) of said stack (12); a plurality of rotatable magnetic rollers (11) mounted to said fixed frame (1) for engaging and supporting a sheet (14) when said movable frame (2) is in its upper position with a sheet (14) carried by said suction grippers (7); a movable carrier member (18) for removing said sheet (14) supported by said magnetic rollers (11); and means (50-52) for displacing said suction grippers (7) relative to said movable frame (2) to clear the sheet (14) supported by said magnetic rollers (11), so that said movable frame (2) can be lowered past said supported sheet (14) to engage a further sheet from said stack (12).
Claim 2
Dependent Claim
178 words
Apparatus for removing sheets from a stack of sheets, comprising: a fixed frame (1); a movable frame (2) mounted to said fixed frame (1) and being at least vertically movable relative to said fixed frame (1) from a lower position adjacent a stack of sheets (12) to an upper position; a plurality of suction grippers (7) mounted to said movable frame (2) for engagement with the top sheet (14) of said stack (12); a plurality of rotatable magnetic rollers (11) mounted to said fixed frame (1) for engaging and supporting a sheet (14) when said movable frame (2) is in its upper position with a sheet (14) carried by said suction grippers (7); a movable carrier member (18) for removing said sheet (14) supported by said magnetic rollers (11); and means (50-52) for displacing said suction grippers (7) relative to said movable frame (2) to clear the sheet (14) supported by said magnetic rollers (11), so that said movable frame (2) can be lowered past said supported sheet (14) to engage a further sheet from said stack (12).
Claim 3
Dependent Claim
34 words
Apparatus according to claim 1 wherein said rotatable magnetic rollers (11) are mounted to said fixed frame by means of respective horizontally extending shafts (10), said rollers being rotatably mounted to said respective shafts.
Claim 4
Dependent Claim
26 words
Apparatus according to claim 1 wherein said magnetic rollers (11) are adjustably mounted to said fixed frame (1) to enable adjustment for varying sizes of sheets.
Claim 5
Dependent Claim
29 words
Apparatus according to claim 1 wherein said means (50-52) for displacing said suction grippers (7) includes means for horizontally displacing said suction grippers relative to said movable frame (2).
Claim 6
Dependent Claim
43 words
Apparatus according to claim 1 wherein said fixed frame includes at least one longitudinal member (101) horizontally displaceable relative to said fixed frame (1), and wherein said movable frame (2) is movably coupled to said at least one horizontally displaceable longitudinal member (101).
Claim 7
Dependent Claim
39 words
Apparatus according to claim 5 including a piston-cylinder assembly (3) movably coupling said movable frame (2) to said at least one horizontally displaceable longitudinal member (101), said movable frame being vertically movable relative to said horizontally displaceable longitudinal member.
Claim 8
Dependent Claim
23 words
Apparatus according to claim 5 including vertically extending guide rods (4) slideably coupling said movable frame to said horizontally displaceable longitudinal member (101).
Claim 9
Dependent Claim
27 words
Apparatus according to claim 7 wherein said guide rods are fixedly coupled to said movable frame and are slideably mounted to said horizontally displaceable longitudinal member (101).
Claim 10
Dependent Claim
28 words
Apparatus according to claim 1 wherein said means (50-52) for displacing said suction grippers includes at least one cylinder-piston assembly coupling said suction grippers to said movable frame.
Claim 11
Dependent Claim
22 words
Apparatus according to claim 1 wherein each suction gripper is mounted to said movable frame by means of respective displaceable members (52).
Claim 12
Dependent Claim
61 words
Apparatus according to claim 10 wherein said separate displaceable members for mounting said suction grippers to said movable frame each include a slideably mounted guide rod (52) connected at one end to a suction gripper and being slideably mounted to said movable frame, and means for displacing said guide rod relative to said movable frame to thereby displace said suction gripper.
Claim 13
Dependent Claim
43 words
Apparatus according to claim 1 including a holding member (6) carrying a plurality of suction grippers, and being displaceably mounted relative to said movable frame (2), said means for displacing including means for displacing said holding member (6) relative to said movable frame.
Claim 14
Dependent Claim
24 words
Apparatus according to claim 12 wherein each holding member is coupled to said movable frame by a plurality of pivotally connected lever members (22).
Claim 15
Dependent Claim
23 words
Apparatus according to claim 1 wherein said means for displacing said suction grippers is mounted on the outer side of said movable frame.
Claim 16
Dependent Claim
25 words
Apparatus according to claim 12 wherein each suction gripper is displaceably mounted on its respective holding member in a longitudinal slot in the holding member.
Claim 17
Dependent Claim
22 words
Apparatus according to claim 1 wherein said carrier member is moved by at least one cylinder-piston assembly mounted to said fixed frame.
Claim 18
Dependent Claim
27 words
Apparatus according to claim 1 wherein said magnetic rollers are mounted to said longitudinal members (101) by means of hangers (110) displaceably mounted to said longitudinal members.
Claim 19
Dependent Claim
29 words
Apparatus according to claim 17 including two longitudinal members (101) and wherein said hangers (110) are displaceably mounted on cross-rods (111) which are mounted between said two longitudinal members.
Claim 20
Dependent Claim
84 words
Apparatus according to claim 1 wherein each of said suction grippers (7) includes a suction cup (71); a piston (72) in air communication with said suction cup (71), said piston (72) having an air relief opening (74) therein; a slideable member (73) slideably mounted over said piston (72) and adapted to selectively open and close said air relief opening (74); and means (75) for selectively sliding said slideable member (73) over said piston (72) for selectively opening and closing said air relief opening (74).
Claim 21
Dependent Claim
18 words
Apparatus according to claim 19 wherein said means for moving said movable member includes an electrical solenoid (75).
Claim 22
Dependent Claim
31 words
Apparatus according to claim 1 wherein said means (50-52) for displacing said suction grippers (7) displaces said suction grippers to clear said sheet (14) during movement of said carrier member (18).
Claim 23
Dependent Claim
18 words
Apparatus according to claim 2 wherein said magnetic rollers (11) are displaceably mounted on said respective shafts (10).
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |