US3773316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feeder drive mechanism
Assignee: Xerox Corp
•
Filing: 1972-05-22
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Granted: 1973-11-20
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Expires: 1992-05-22
Abstract
Abstract A drive mechanism for controlling the separating and forwarding function of a sheet feeding device for imparting an asynchronous multi-directional motion to the sheet feeding mechanism for accomplishing reverse buckle feeding of individual sheets from a stack.
Inventors
- 👤 D Stemmle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6502; B; B65; B65H; B65H3/00; B65H3/02; B65H3/06; B65H3/0623; B65H3/46; G03D; G03D13/00; G03D13/003; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19623
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
137 words
A drive mechanism including: a deformable cylindrical member having a series of uniformly spaced longitudinal grooves provided about the periphery thereof with the grooves being at a first circular pitch, a relatively non-deformable drive member having a working surface thereon arranged to move into and out of pressure contact against the outer periphery of said cylindrical member, said working surface having a series of uniformly spaced grooves formed therein at a second circular pitch different from said first circular pitch so that some of the area between the grooves on said drive member act to deform the surface of said cylindrical member in pressure contact therewith and other areas between said grooves meshes with the grooves formed in said cylindrical member whereby a positive drive that is free of backlash is maintained between the two coacting members.
Claim 2
Dependent Claim
137 words
A drive mechanism including: a deformable cylindrical member having a series of uniformly spaced longitudinal grooves provided about the periphery thereof with the grooves being at a first circular pitch, a relatively non-deformable drive member having a working surface thereon arranged to move into and out of pressure contact against the outer periphery of said cylindrical member, said working surface having a series of uniformly spaced grooves formed therein at a second circular pitch different from said first circular pitch so that some of the area between the grooves on said drive member act to deform the surface of said cylindrical member in pressure contact therewith and other areas between said grooves meshes with the grooves formed in said cylindrical member whereby a positive drive that is free of backlash is maintained between the two coacting members.
Claim 3
Dependent Claim
35 words
The drive system as described in claim 1 having a plurality of drive members being arranged so that the working surfaces thereon sequentially move into and out of pressure driving contact with said cylindrical member.
Claim 4
Dependent Claim
49 words
The apparatus of claim 1 wherein the grooves formed in the cylindrical member are V-shaped having an included angle of about 90* between the side walls thereof and the grooves formed in said drive member is V-shaped having an included angle of about 60* between the side walls thereof.
Claim 5
Dependent Claim
15 words
The apparatus of claim 1, wherein said cylindrical member is formed of a urethane material.
Claim 6
Dependent Claim
47 words
The drive mechanism of claim 1 wherein the areas between grooves on the drive member deforms the surface of the deformable member in both the peak and valley regions thereon when said drive member is moved in contact with the deformable member to insure a positive drive.
Claim 7
Independent Claim
139 words
An apparatus for driving a sheet feeding mechanism comprising: sheet feeding means for advancing individual sheets from a supply stack; a resilient elastomeric roll member in operative communication with said sheet feeding means, whereby motion imparted to said roll member is translated to the individual sheet, said roll member having a series of spaced longitudinally extending grooves provided about the periphery thereof, said grooves having a first circular pitch; at least one motion imparting element having a working surface thereon arranged to move in frictional driving contact against the periphery of said roll member, whereby a prescribed motion is translated from said at least one element to said roll member, said working surface having a series of spaced longitudinally extending grooves therein, said grooves in said working surface having a second circular pitch different from said first circular pitch.
Claim 8
Independent Claim
139 words
An apparatus for driving a sheet feeding mechanism comprising: sheet feeding means for advancing individual sheets from a supply stack; a resilient elastomeric roll member in operative communication with said sheet feeding means, whereby motion imparted to said roll member is translated to the individual sheet, said roll member having a series of spaced longitudinally extending grooves provided about the periphery thereof, said grooves having a first circular pitch; at least one motion imparting element having a working surface thereon arranged to move in frictional driving contact against the periphery of said roll member, whereby a prescribed motion is translated from said at least one element to said roll member, said working surface having a series of spaced longitudinally extending grooves therein, said grooves in said working surface having a second circular pitch different from said first circular pitch.
Claim 9
Dependent Claim
15 words
An apparatus as in claim 6 wherein, said at least one element is relatively non-deformable.
Claim 10
Dependent Claim
45 words
An apparatus as in claim 6 wherein, the periphery of said roll member and the working surface of said at least one element are tooth-like, with the tooth profile on said roll member being different from the tooth profile on said at least one element.
Claim 11
Dependent Claim
20 words
An apparatus as in claim 6 wherein, said first tooth pitch is a non-interger multiple of said second tooth pitch.
Claim 12
Dependent Claim
33 words
An apparatus as in claim 6 including a plurality of motion imparting elements arranged so that the working surfaces thereon sequentially move into and out of frictional driving contact with said roll member.
Claim 13
Dependent Claim
42 words
An apparatus as in claim 10 wherein, first and second motion imparting elements are provided, said first motion imparting element being arranged to move in a first direction and said second motion imparting element being arranged to move in an opposite direction.
Claim 14
Dependent Claim
105 words
An apparatus as in claim 11, wherein said sheet feeding means includes a supply tray for supporting said stack, a feed roll arranged to contact the uppermost sheet in said stack, said feed roll being supported by a shaft connected to said roll member, whereby said first motion imparting element causes said feed roller to advance the uppermost sheet rearwardly against the rear wall of said supply tray to form a separating buckle therein and said second motion imparting element causes said feed roll to reverse the direction in which said sheet is being advanced so as to forward said sheet from said supply tray.
Claim 15
Dependent Claim
20 words
An apparatus as in claim 12, wherein said feed roll and said roll member are coaxially supported upon said shaft.
Claim 16
Dependent Claim
35 words
An apparatus as in claim 13, wherein a gear is operatively connected to each of said first and second elements said gears being meshed together to coordinate the motion of said first and second elements.
Claim 17
Dependent Claim
31 words
An apparatus as in claim 10, wherein a gear is operatively connected to each of said elements and wherein said gears are meshed together to coordinate the motion of said elements.
Claim 18
Dependent Claim
16 words
An apparatus as in claim 14, wherein said elements are formed of a relatively non-deformable material.
Claim 19
Dependent Claim
39 words
An apparatus as in claim 16, wherein the periphery of said roll member and the working surfaces of said elements are tooth-like with the tooth profile on said roll member being different from the tooth profile on said elements.
Claim 20
Dependent Claim
50 words
An apparatus as in claim 17, wherein the grooves formed in the periphery of said roll member are V-shaped having an included angle of about 90* between the sidewalls thereof and the grooves formed in said elements are V-shaped having an included angle of about 60* between the sidewalls thereof.
Claim 21
Dependent Claim
16 words
An apparatus as in claim 18, wherein said roll member is formed of a urethane material.
Claim 22
Dependent Claim
13 words
An apparatus as in claim 19, wherein said elements are formed of aluminum.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |