Patent US3910184A successfully refreshed from Google Patents.
US3910184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick coupling for the drum of a duplicating duplicator
Assignee: Heyer Inc
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Filing: 1974-05-13
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Granted: 1975-10-07
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Expires: 1994-05-13
Abstract
Abstract Duplicating machine having a drum rotatably mounted between a pair of side frames. Drum has a cylindrical wall having perforations communicating with an internal ink reservoir. An open mesh screen is stretched about the drum to provide an external cylindrical auxiliary reservoir immediately beneath an ink-distributing pad. Copy sheets are fed from a stack by adjustable pressure feed wheels and advanced along a path of movement to a first bight between a pair of forwarding rollers, and then to a second bight between an impression roll and the drum. Flexible paper strippers positively guide sheets to and from the drum, and are held out of wearing contact against stencil by raised peripheral rings at ends of drum. A pair of independently pivotal brackets support the ends of the impression roll and are spring-biased to press the impression roll toward the drum. Two transverse springs on each bracket are swingable to adjust the pressure of the impression roll on the drum. Impression roll is releasable without tools by manual endwise movement. A pivotal latch shaft has a pair of catch levers at opposite ends and radial paper sensing means intermediate them. The latch shaft is pivotable to and from a latching position wherein the brackets are engageable with the catch levers to hold the impression roll spaced from the drum and the paper sensing means across the path of movement between the first and second bights in the absence of a copy sheet. A cam, rotatable with the drum once per revolution, moves a rigid pivotal actuating frame and this in turn moves both brackets simultaneously to shift the impression roll away from the drum and to free the brackets and catch levers from frictional engagement with one another. Paper stop means is provided behind the forwarding rollers. Catch levers, controlled by the paper sensing means, hold the impression roll away from the drum in the absense of paper. Movements of parts and paper are synchronized enabling the cam to disengage the brackets from the catch levers as a sheet approaches the paper sensing means, and continued advance of the sheet against the paper sensing means swings the catch levers out of the way to enable the impression roll to press the sheet against a stencil on the drum. A single manually rotatable shaft connects and disconnects the drum. A quick release stencil clamp on the drum has a knife edge for removing the cover sheet from an underlying stencil. A manually releasable anchor enables quick, clean ink pad changes.
Inventors
- 👤 Edward M Springer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:43
CPC Classifications
B; B41; B41L; B41L13/00; B41L13/04; B41L13/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
197 words
In a duplicating machine, means for connecting and disconnecting a rotatable drum in a housing including: a pair of supporting members at the ends of said drum journaled in said housing for rotation with said drum about a common axis; first and second shafts aligned along said axis, and carried respectively by one of said supporting members and by said drum; said first shaft being manually movable between an extended position connected with said drum, and a retracted position disconnected from said drum; said second shaft being movable between an extended position connected with the other of said supporting members, and a retracted position disconnected from said other supporting member; means for moving said second shaft to its said extended position in response to movement of said first shaft to its said extended position, and biasing means, within said drum, effective to move said second shaft to its said retracted position in response to movement of said first shaft to its said retracted position; whereby movement of said first shaft in one direction connects said drum to both supporting members, and movement of said first shaft in the opposite direction disconnects said drum from both supporting members.
Claim 2
Dependent Claim
197 words
In a duplicating machine, means for connecting and disconnecting a rotatable drum in a housing including: a pair of supporting members at the ends of said drum journaled in said housing for rotation with said drum about a common axis; first and second shafts aligned along said axis, and carried respectively by one of said supporting members and by said drum; said first shaft being manually movable between an extended position connected with said drum, and a retracted position disconnected from said drum; said second shaft being movable between an extended position connected with the other of said supporting members, and a retracted position disconnected from said other supporting member; means for moving said second shaft to its said extended position in response to movement of said first shaft to its said extended position, and biasing means, within said drum, effective to move said second shaft to its said retracted position in response to movement of said first shaft to its said retracted position; whereby movement of said first shaft in one direction connects said drum to both supporting members, and movement of said first shaft in the opposite direction disconnects said drum from both supporting members.
Claim 3
Dependent Claim
47 words
In a duplicating machine, the combination of claim 1 in which biasing means within said drum includes a spring urging said second shaft toward its said retracted position, and said shafts are engageable for overriding said spring while moving said second shaft to its said extended position.
Claim 4
Dependent Claim
32 words
In a duplicating machine, the combination of claim 2 including a lockable connection between said first shaft and said drum effective when locked to hold said shafts in their said extended positions.
Claim 5
Dependent Claim
95 words
In a duplicating machine, the combination of claim 1 in which: each of said rotatable supporting members has a pair of circumferentially spaced radially outwardly facing shoulders and a rib between said shoulders extending radially outwardly therefrom; and each end of said drum has a pair of lugs circumferentially and radially spaced thereon to straddle said rib and engage said shoulders on an adjacent supporting member when said drum and supporting members are in axial alignment, to facilitate aligning said drum with said supporting members before connecting said drum by said first and second shafts.
Claim 6
Dependent Claim
69 words
In a duplicating machine, the combination of claim 4 in which: a third lug is provided on each end of said drum radially outwardly of said pair of lugs; and said third lugs at the opposite ends of said drum provide connections for a bail to transfer said drum between said housing and a separate storage stand when said first and second shafts are in their said retracted positions.
Claim 7
Dependent Claim
329 words
In a duplicating machine, means for connecting and disconnecting a rotatable drum in a housing including: a pair of supporting members at the ends of said drum journaled in said housing for rotation with said drum about a common axis; first and second shafts aligned along said axis, and carried respectively by one of said supporting members and by said drum; said first shaft being manually movable between an extended position connected with said drum, and a retracted position disconnected from said drum; said second shaft being movable between an extended position connected with the other of said supporting members, and a retracted position disconnected from said other supporting member; means for moving said second shaft to its said extended position in response to movement of said first shaft to its said extended position, and biasing means within said drum effective to move said second shaft to its said retracted position in response to movement of said first shaft to its said retracted position whereby movement of said first shaft in one direction and in the opposite direction respectively connects said drum to and disconnects said drum from both supporting members; each of said supporting members having a pair of circumferentially spaced radially outwardly facing shoulders and a rib between said shoulders extending radially outwardly therefrom; each end of said drum having a pair of lugs circumferentially and radially spaced thereon to straddle said rib and engage said shoulders on an adjacent supporting member when said drum and supporting members are in axial alignment, to facilitate aligning said drum with said supporting members before connecting said drum by said first and second shafts; and a storage stand for supporting said drum separate from said housing having a pair of vertical support arms extending upwardly from a base each arm having a pair of stationary upwardly facing horizonal shoulders and a rib between said shoulders which are substantial counterparts of those on a corresponding one of said rotatable supporting members.
Claim 8
Dependent Claim
329 words
In a duplicating machine, means for connecting and disconnecting a rotatable drum in a housing including: a pair of supporting members at the ends of said drum journaled in said housing for rotation with said drum about a common axis; first and second shafts aligned along said axis, and carried respectively by one of said supporting members and by said drum; said first shaft being manually movable between an extended position connected with said drum, and a retracted position disconnected from said drum; said second shaft being movable between an extended position connected with the other of said supporting members, and a retracted position disconnected from said other supporting member; means for moving said second shaft to its said extended position in response to movement of said first shaft to its said extended position, and biasing means within said drum effective to move said second shaft to its said retracted position in response to movement of said first shaft to its said retracted position whereby movement of said first shaft in one direction and in the opposite direction respectively connects said drum to and disconnects said drum from both supporting members; each of said supporting members having a pair of circumferentially spaced radially outwardly facing shoulders and a rib between said shoulders extending radially outwardly therefrom; each end of said drum having a pair of lugs circumferentially and radially spaced thereon to straddle said rib and engage said shoulders on an adjacent supporting member when said drum and supporting members are in axial alignment, to facilitate aligning said drum with said supporting members before connecting said drum by said first and second shafts; and a storage stand for supporting said drum separate from said housing having a pair of vertical support arms extending upwardly from a base each arm having a pair of stationary upwardly facing horizonal shoulders and a rib between said shoulders which are substantial counterparts of those on a corresponding one of said rotatable supporting members.
Claim 9
Dependent Claim
287 words
In a duplicating machine, means for quickly connecting and disconnecting a rotatable drum between a pair of side frames including: a pair of supporting members at the ends of said drum journaled in said side frames for rotation with said drum about a common axis of rotation; said supporting members having bores aligned along said axis of rotation; an axial sleeve in said drum; a screw-threaded bushing within said sleeve; a first shaft, within the bore of one of said supporting members, axially shiftable between an extended position engaged within an end of said sleeve, and a retracted position disengaged from said sleeve; a second shaft, within said sleeve, axially shiftable between an extended position having an end portion engaged within the bore in the other of said supporting members, and a retracted position disengaged from the bore in said other supporting member; and spring means within said drum urging said second shaft toward its said retracted position; said first shaft having a manually operable handle at its outer end portion exteriorly of said one supporting member, and a screw-threaded extension at its inner end portion; said first shaft, when moved to its said extended position, being engageable with said second shaft to shift said second shaft to its said extended position, and being rotatable to engage the threads of said extension and bushing to hold said shafts in their respective extended positions, thereby simultaneously connecting both ends of said drum with said supporting members; said first shaft, when moved to its said retracted position, being disengageable from said second shaft enabling said spring means to shift said second shaft to its said retracted position, thereby simultaneously disconnecting both ends of said drum from said sUpporting members.
Claim 10
Dependent Claim
287 words
In a duplicating machine, means for quickly connecting and disconnecting a rotatable drum between a pair of side frames including: a pair of supporting members at the ends of said drum journaled in said side frames for rotation with said drum about a common axis of rotation; said supporting members having bores aligned along said axis of rotation; an axial sleeve in said drum; a screw-threaded bushing within said sleeve; a first shaft, within the bore of one of said supporting members, axially shiftable between an extended position engaged within an end of said sleeve, and a retracted position disengaged from said sleeve; a second shaft, within said sleeve, axially shiftable between an extended position having an end portion engaged within the bore in the other of said supporting members, and a retracted position disengaged from the bore in said other supporting member; and spring means within said drum urging said second shaft toward its said retracted position; said first shaft having a manually operable handle at its outer end portion exteriorly of said one supporting member, and a screw-threaded extension at its inner end portion; said first shaft, when moved to its said extended position, being engageable with said second shaft to shift said second shaft to its said extended position, and being rotatable to engage the threads of said extension and bushing to hold said shafts in their respective extended positions, thereby simultaneously connecting both ends of said drum with said supporting members; said first shaft, when moved to its said retracted position, being disengageable from said second shaft enabling said spring means to shift said second shaft to its said retracted position, thereby simultaneously disconnecting both ends of said drum from said sUpporting members.
Claim 11
Dependent Claim
200 words
In a duplicating machine, means for quickly connecting and disconnecting a rotatable drum within a housing including: a pair of supporting members at the ends of said drum journaled in said housing for rotation with said drum about a common axis of rotation; said drum having axial openings at opposite ends thereof; a first shaft, having an external handle, journaled in one of said supporting members for axial movement through one of said axial openings to and from a position engaged with said drum; a second shaft, journaled within said drum for axial movement through the opposite of said axial openings to and from a position engaged with said other supporting member; means for moving said second shaft through said opposite axial opening in response to movement of said first shaft through said one axial opening, to thereby connect both ends of said drum simultaneously with said supporting members by means of said shafts; and biasing means within said drum for moving said second shaft automatically to a position wholly recessed within said drum in response to withdrawal of said first shaft from said one axial opening, to thereby disconnect both ends of said drum simultaneously from said supporting members.
Claim 12
Dependent Claim
200 words
In a duplicating machine, means for quickly connecting and disconnecting a rotatable drum within a housing including: a pair of supporting members at the ends of said drum journaled in said housing for rotation with said drum about a common axis of rotation; said drum having axial openings at opposite ends thereof; a first shaft, having an external handle, journaled in one of said supporting members for axial movement through one of said axial openings to and from a position engaged with said drum; a second shaft, journaled within said drum for axial movement through the opposite of said axial openings to and from a position engaged with said other supporting member; means for moving said second shaft through said opposite axial opening in response to movement of said first shaft through said one axial opening, to thereby connect both ends of said drum simultaneously with said supporting members by means of said shafts; and biasing means within said drum for moving said second shaft automatically to a position wholly recessed within said drum in response to withdrawal of said first shaft from said one axial opening, to thereby disconnect both ends of said drum simultaneously from said supporting members.
Claim 13
Dependent Claim
233 words
In a duplicating machine having a printing drum rotatably supported between a pair of spaced side frames, apparatus for connecting and disconnecting said drum comprising: axially aligned supporting members rotatably journaled in said side frames; an open sleeve extending between ends of said drum along the rotational axis thereof; a first, manually actuated shaft supported by one of said supporting members for axial movement therein; a second, automatically actuated shaft supported by said sleeve for axial movement therein; the other of said supporting members having connecting means engageable with said second shaft when extended from said sleeve; said second shaft being movable through one end of said sleeve to engage said connecting means in response to movement of said first shaft into the other end of said sleeve to thereby connect both ends of said drum to said supporting members; locking means for locking said shafts in connected position in response to rotation of said first shaft relative to said sleeve; a stop within said sleeve; and spring biasing means automatically urging said second shaft toward said stop to a position wholly between the ends of said sleeve in response to withdrawal of said first shaft from said sleeve; whereby both ends of said drum can be connected or disconnected simultaneously in a single operation by manually moving said first shaft into or out of said sleeve at one end of the drum.
Claim 14
Dependent Claim
233 words
In a duplicating machine having a printing drum rotatably supported between a pair of spaced side frames, apparatus for connecting and disconnecting said drum comprising: axially aligned supporting members rotatably journaled in said side frames; an open sleeve extending between ends of said drum along the rotational axis thereof; a first, manually actuated shaft supported by one of said supporting members for axial movement therein; a second, automatically actuated shaft supported by said sleeve for axial movement therein; the other of said supporting members having connecting means engageable with said second shaft when extended from said sleeve; said second shaft being movable through one end of said sleeve to engage said connecting means in response to movement of said first shaft into the other end of said sleeve to thereby connect both ends of said drum to said supporting members; locking means for locking said shafts in connected position in response to rotation of said first shaft relative to said sleeve; a stop within said sleeve; and spring biasing means automatically urging said second shaft toward said stop to a position wholly between the ends of said sleeve in response to withdrawal of said first shaft from said sleeve; whereby both ends of said drum can be connected or disconnected simultaneously in a single operation by manually moving said first shaft into or out of said sleeve at one end of the drum.
Claim 15
Dependent Claim
142 words
In a duplicating machine, the combination of claim 9 in which: each of said supporting members includes a mounting disc, said discs being parallel, coaxial and spaced apart to enable fitting of said drum endwise therebetween; and a rotatable driving connection is provided between each said disc and an adjacent end of said drum including a radial rib and a pair of circumferentially spaced eccentric lugs, enabling said drum to be assembled between said discs, and to be disassembled therefrom, by moving said drum transverse to the axis of rotation of the drum to respectively seat, and unseat, each rib between a corresponding pair of said lugs; whereby said drum is centered relative to the discs by said first and second shafts, and whereby rotational torque is transmitted from one disc to the other through the drum via the rotatable driving connections.
Claim 16
Dependent Claim
105 words
In a duplicating machine, the combination of claim 9 in which: said sleeve and said first shaft have a screw-threaded connection therebetween; and said shafts are engageable before said screw-threaded connection is engageable on inward movement of said first shaft; whereby in connecting said drum between said sideframes said second shafT may be extended from said drum in two successive increments, namely, a straight axial movement of said first shaft prior to engagement of said screw-threaded connection to thereby preliminarily extend said second shaft from said sleeve, followed by rotation of said first shaft to finally extend and lock said second shaft in extended position.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |