Patent US3821142A successfully refreshed from Google Patents.
Patent US3861252A successfully refreshed from Google Patents.
US3861252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air chuck for roll slitting machine
Assignee: JUDELSHON INDUSTRIES
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Filing: 1974-03-04
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Granted: 1975-01-21
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Expires: 1994-03-04
Abstract
Abstract An improved air chuck for use in a roll slitting machine of the type used to slit wide rolls of material into narrow width rolls or ribbons. The air chuck includes gripping jaws which are actuated by air pressure to grip and rotate the core of a roll of material. The chuck provides a rotating mandrel for the core at the point it is engaged by the jaws and it also provides coaxial internal bearing means for a stationary mandrel adapted to extend coaxially through the core on the roll of material in order to support the roll as it is rotated.
Inventors
- 👤 Carl A Stoffels
- 👤 Roger J Lofstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:59
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/18; B23B31/24; B23B31/30; Y; Y10; Y10T; Y10T279/00; Y10T279/12; Y10T279/1224; Y10T279/1241; Y10T82/00; Y10T82/16; Y10T82/16426; Y10T82/16967; Y10T82/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
259 words
In a machine for slitting a roll of material wound onto a core and into cylindrical form as said roll is rotated about a stationary mandrel; the improvement comprising an improved fluid actuated chuck for gripping the core of a roll of material, said chuck comprising a chuck body mounted in the frame of said machine coaxially with the machine mandrel including bearing means for the free rotation thereof, bearing means within said rotating chuck body attached to receive one end of the machine mandrel and to support same in a stationary non-rotating manner, chuck jaw means movably mounted on said rotating chuck body and movable from a gripping position in which said jaws are engaged with the core of a roll of material to be slit and a release position disengaged from the core, fluid powered actuation means operatively connected to said chuck jaw means to move same from the release position to the gripping position, fluid pressure means including rotatable fluid coupling means providing a connection between said rotating portion of said chuck and a source of fluid pressure and means providing a fluid passage way from said rotatable coupling member to said fluid powered actuation for moving said jaw means from the release position to the gripping position, drive means connected to said rotating chuck body of said chuck for rotating a roll of material on the machine mandrel by rotating said chuck body and said chuck jaw means when the same are engaged with the core of a roll of material mounted on the mandrel.
Claim 2
Dependent Claim
259 words
In a machine for slitting a roll of material wound onto a core and into cylindrical form as said roll is rotated about a stationary mandrel; the improvement comprising an improved fluid actuated chuck for gripping the core of a roll of material, said chuck comprising a chuck body mounted in the frame of said machine coaxially with the machine mandrel including bearing means for the free rotation thereof, bearing means within said rotating chuck body attached to receive one end of the machine mandrel and to support same in a stationary non-rotating manner, chuck jaw means movably mounted on said rotating chuck body and movable from a gripping position in which said jaws are engaged with the core of a roll of material to be slit and a release position disengaged from the core, fluid powered actuation means operatively connected to said chuck jaw means to move same from the release position to the gripping position, fluid pressure means including rotatable fluid coupling means providing a connection between said rotating portion of said chuck and a source of fluid pressure and means providing a fluid passage way from said rotatable coupling member to said fluid powered actuation for moving said jaw means from the release position to the gripping position, drive means connected to said rotating chuck body of said chuck for rotating a roll of material on the machine mandrel by rotating said chuck body and said chuck jaw means when the same are engaged with the core of a roll of material mounted on the mandrel.
Claim 3
Dependent Claim
47 words
The device in accordance with claim 1 wherein said rotating portion includes a hollow member extending axially outwardly from said bearing means which mount said rotating member coaxially with the stationary mandrel, the end of the mandrel being received into said hollow member and being supported thereby.
Claim 4
Dependent Claim
38 words
The device in accordance with claim 2 wherein rotating bearing means are provided between the end of said stationary mandrel and the inside of said hollow member to rotatably support said mandrel as said chuck rotates about it.
Claim 5
Dependent Claim
78 words
The device in accordance with claim 3 wherein said chuck includes a cylindrical collar mounted on said rotating chuck body of a diameter compatible with the internal diameter of the core and located radially inwardly of said chuck jaw means, said chuck jaw means when in said gripping position engaging the exterior of a core of a roll of material between said jaw means with said cylindrical collar providing a clamping support on the interior of said core.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |