US3918707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive device for holding paper on a rotating drum
Assignee: Alcatel CIT SA
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Filing: 1973-09-14
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Granted: 1975-11-11
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Expires: 1993-09-14
Abstract
Abstract A rotating drum has a gripper bar mounted for cooperation therewith to convey sheets. The gripper bar is manually moved from a stationary first position spaced from the rotating drum to a second position to grip the sheet against the drum and rotate therewith. After moving through a predetermined angle, the eccentric mounting of the gripper bar causes the bar to move away from the drum and assume the stationary first position.
Inventors
- 👤 Jean Villemer
- 👤 Michel Landwerlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:55
CPC Classifications
B; B65; B65H; B65H29/00; B65H29/02; B65H29/06; B65H29/12; G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/585; G03B27/62; G03B27/6207; G03B27/625; G03B27/6257
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
144 words
A device for holding paper on a rotating drum, comprising drive means for continuously turning said drum about its axis, a crossbar disposed in parallel to the axis of said drum, rotatable mounting means for supporting said crossbar for movement in the radial direction of said drum between a position in contact with the surface thereof and an outer position spaced from said surface, said mounting means being rotated by said drum only when said crossbar is in contact with the surface of said drum, a toothed wheel engaging with said rotatable mounting means so as to be rotated thereby only when said crossbar is in contact with the surface of said drum, and cyclic control means connected to said toothed wheel for returning said crossbar to an initial position spaced from the surface of said drum subsequent to the initiation of rotation thereof.
Claim 2
Independent Claim
144 words
A device for holding paper on a rotating drum, comprising drive means for continuously turning said drum about its axis, a crossbar disposed in parallel to the axis of said drum, rotatable mounting means for supporting said crossbar for movement in the radial direction of said drum between a position in contact with the surface thereof and an outer position spaced from said surface, said mounting means being rotated by said drum only when said crossbar is in contact with the surface of said drum, a toothed wheel engaging with said rotatable mounting means so as to be rotated thereby only when said crossbar is in contact with the surface of said drum, and cyclic control means connected to said toothed wheel for returning said crossbar to an initial position spaced from the surface of said drum subsequent to the initiation of rotation thereof.
Claim 3
Dependent Claim
49 words
A device as defined in claim 1 wherein said rotatable mounting means includes a guide shaft mounted eccentrically with respect to the axis of said drum and an annular holder having a gear portion mounted for rotation on said guide shaft, said gear portion engaging with said toothed wheel.
Claim 4
Dependent Claim
38 words
A device as defined in claim 2 wherein said rotatable mounting means further includes slide means for holding said crossbar on said annular holder and bias means for biasing said crossbar inwardly toward the axis of said drum.
Claim 5
Dependent Claim
21 words
A device as defined in claim 3, further including a roller resiliently mounted in contact with the surface of said drum.
Claim 6
Independent Claim
147 words
A device for holding paper on a rotating drum, comprising drive means for continuously turning said drum about its axis, a crossbar disposed in parallel to the axis of said drum, rotatable mounting means for supporting said crossbar for movement in the radial direction of said drum between a position in contact with the surface thereof and an outer position spaced from said surface, said mounting means being rotated by said drum when said crossbar is made to contact the surface of said drum, a toothed wheel engaging with said rotatable mounting means so as to rotate therewith, and cyclic control means connected to said toothed wheel for returning said crossbar to an initial position spaced from the surface of said drum subsequent to the initiation of rotation thereof, said rotatable mounting means including a hollow guide shaft fitted over an axial drive shaft of said drum.
Claim 7
Independent Claim
147 words
A device for holding paper on a rotating drum, comprising drive means for continuously turning said drum about its axis, a crossbar disposed in parallel to the axis of said drum, rotatable mounting means for supporting said crossbar for movement in the radial direction of said drum between a position in contact with the surface thereof and an outer position spaced from said surface, said mounting means being rotated by said drum when said crossbar is made to contact the surface of said drum, a toothed wheel engaging with said rotatable mounting means so as to rotate therewith, and cyclic control means connected to said toothed wheel for returning said crossbar to an initial position spaced from the surface of said drum subsequent to the initiation of rotation thereof, said rotatable mounting means including a hollow guide shaft fitted over an axial drive shaft of said drum.
Claim 8
Dependent Claim
51 words
A device as defined in claim 5, wherein said guide shaft is eccentrically mounted with respect to the axis of said drum and said rotatable mounting means further includes an annular holder having a gear portion mounted for rotation on said guide shaft, said gear portion engagiNg with said toothed wheel.
Claim 9
Dependent Claim
38 words
A device as defined in claim 6, wherein said rotatable mounting means further includes slide means for holding said crossbar on said annular holder and bias means for biasing said crossbar inwardly toward the axis of said drum.
Claim 10
Independent Claim
157 words
A device for holding paper on a rotating drum, comprising drive means for continuously turning said drum about its axis, a crossbar disposed in parallel to the axis of said drum, rotatable mounting means for supporting said crossbar for movement in the radial direction of said drum between a position in contact with the surface thereof and an outer position spaced from said surface, said mounting means being rotated by said drum when said crossbar is in contact with the surface of said drum, a toothed wheel engaging with said rotatable mounting means so as to rotate therewith, and cyclic control means connected to said toothed wheel for returning said crossbar to an initial position spaced from the surface of said drum subsequent to the initiation of rotation thereof, said cyclic control means including a coil spring secured to a fixed support at one end and to a point on said toothed wheel at the other end.
Claim 11
Independent Claim
157 words
A device for holding paper on a rotating drum, comprising drive means for continuously turning said drum about its axis, a crossbar disposed in parallel to the axis of said drum, rotatable mounting means for supporting said crossbar for movement in the radial direction of said drum between a position in contact with the surface thereof and an outer position spaced from said surface, said mounting means being rotated by said drum when said crossbar is in contact with the surface of said drum, a toothed wheel engaging with said rotatable mounting means so as to rotate therewith, and cyclic control means connected to said toothed wheel for returning said crossbar to an initial position spaced from the surface of said drum subsequent to the initiation of rotation thereof, said cyclic control means including a coil spring secured to a fixed support at one end and to a point on said toothed wheel at the other end.
Claim 12
Dependent Claim
49 words
A device as defined in claim 8, wherein said rotatable mounting means includes a guide shaft mounted eccentrically with respect to the axis of said drum and an annular holder having a gear portion mounted for rotation on said guide shaft, said gear portion engaging with said toothed wheel.
Claim 13
Dependent Claim
38 words
A device as defined in claim 9, wherein said rotatable mounting means further includes slide means for holding said crossbar on said annular holder and bias means for biasing said crossbar inwardly toward the axis of said drum.
Claim 14
Independent Claim
179 words
A device for holding paper on a rotating drum, comprising drive means for continuously turning said drum about its axis, a crossbar disposed in parallel to the axis of said drum, rotatable mounting means for supporting said crossbar for movement in the radial direction of said drum between a position in contact with the surface thereof and an outer position spaced from said surface, said mounting means being rotated by said drum when said crossbar is made to contact the surface of said drum, a toothed wheel engaging with said rotatable mounting means so as to rotate therewith, and cyclic control means connected to said toothed wheel for returning said crossbar to an initial position spaced from the surface of said drum subsequent to the initiation of rotation thereof, said rotatable mounting means including a guide shaft mounted eccentrically with respect to the axis of said drum on each side of said drum and a pair of annular holders mounted on the respective guide shafts, the respective ends of said crossbar being supported on one of said annular holders.
Claim 15
Independent Claim
179 words
A device for holding paper on a rotating drum, comprising drive means for continuously turning said drum about its axis, a crossbar disposed in parallel to the axis of said drum, rotatable mounting means for supporting said crossbar for movement in the radial direction of said drum between a position in contact with the surface thereof and an outer position spaced from said surface, said mounting means being rotated by said drum when said crossbar is made to contact the surface of said drum, a toothed wheel engaging with said rotatable mounting means so as to rotate therewith, and cyclic control means connected to said toothed wheel for returning said crossbar to an initial position spaced from the surface of said drum subsequent to the initiation of rotation thereof, said rotatable mounting means including a guide shaft mounted eccentrically with respect to the axis of said drum on each side of said drum and a pair of annular holders mounted on the respective guide shafts, the respective ends of said crossbar being supported on one of said annular holders.
Claim 16
Dependent Claim
36 words
A device as defined in claim 1 wherein said cyclic control means includes a coil spring secured to a fixed support at one end and to a point on said toothed wheel at the other end.
Claim 17
Dependent Claim
20 words
A device as defined in claim 12, further including a roller resiliently mounted in contact with the surface of said
Claim 18
Dependent Claim
44 words
A device as defined in claim 11, wherein a toothed wheel is provided on each side of said drum and each of said annular holders includes a gear portion mounted for rotation on said guide shafts, said gear portions engaging with said toothed wheels.
Claim 19
Dependent Claim
38 words
A device as defined in claim 14, wherein said rotatable mounting means further includes slide means for holding said crossbar on said annular holders and bias means for biasing said crossbar inwardly toward the axis of said drum.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |