US 12,741,839 B2Granted

Skew correction device and medium processing apparatus

AssigneeSeiko Epson Corporation

InventorSoichiro Kii

Life of this patent

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Abstract

A skew correction device is configured to transport a medium through regular rotation of a resist roller and correct skew of the medium through reverse rotation or stoppage of the resist roller. The skew correction device includes the resist roller, a driven roller configured to transport the medium by nipping the medium together with the resist roller and correct skew of the medium, and a driving force transmission unit configured to transmit a driving force from a driving source to the resist roller, wherein the driving force transmission unit includes a torque limiter configured to regularly rotate the resist roller by transmitting a driving source from the driving source, and a clutch configured to perform switching between a state of regularly rotating the resist roller and a state of reversely rotating or stopping the resist roller.

Claims17

Dependent claims

A skew correction device for transporting a medium through regular rotation of a resist roller and correct skew of the medium through reverse rotation or stoppage of the resist roller, the skew correction device comprising:

the resist roller is configured to rotate about a roller shaft integrally with the roller shaft;
a driven roller configured to transport the medium by nipping the medium together with the resist roller and correct skew of the medium;
and
a driving force transmission unit configured to transmit a driving force from a driving source to the resist roller, wherein
the driving force transmission unit includes:
a torque limiter configured to regularly rotate the resist roller by transmitting the driving force from the driving source;
and
a clutch configured to perform switching between a state of regularly rotating the resist roller and a state of reversely rotating or stopping the resist roller, wherein
the torque limiter and the clutch are disposed on the roller shaft which is common to both the torque limiter and the clutch,
the clutch includes:
a stoppage clutch configured to stop rotation of the resist roller;
and
a reverse-rotation clutch being in a cut-off state of not transmitting a driving force at a time of regular rotation of the resist roller and being in a reverse-rotation coupling state of transmitting a driving force at the time of reverse rotation of the resist roller,
the driving force transmission unit includes an idle gear being engaged with the reverse-rotation clutch and being configured to transmit a driving force from the driving source to the reverse-rotation clutch, and
the idle gear reversely rotates the resist roller in the reverse-rotation coupling state.

12 more elements

the resist roller is configured to rotate about a roller shaft integrally with the roller shaft;
a driven roller configured to transport the medium by nipping the medium together with the resist roller and correct skew of the medium;
and
a driving force transmission unit configured to transmit a driving force from a driving source to the resist roller, wherein
the driving force transmission unit includes:
a first clutch being in a coupling state of transmitting a driving force at the time of regular rotation of the resist roller and being in a cut-off state of not transmitting a driving force at the time of reverse rotation of the resist roller;
a second clutch being in a cut-off state of not transmitting a driving force at the time of regular rotation of the resist roller and being in a coupling state of transmitting a driving force at the time of reverse rotation of the resist roller, the first clutch and the second clutch being coaxial with the roller shaft;
an idle gear being engaged with the second clutch and being configured to transmit a driving force from the driving source to the second clutch;
a first toothed gear being engaged with the first clutch and being configured to transmit a driving force from the driving source to the first clutch;
and
a second toothed gear being engaged with the idle gear and being configured to transmit a driving force from the driving source to the idle gear,
the first clutch and the second clutch are coaxially provided,
the first toothed gear and the second toothed gear are coaxially provided,
one of the first toothed gear and the second toothed gear receives a driving force from the driving source, and
another one of the first toothed gear and the second toothed gear is integrally rotated with the one thereof.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/331,654Filed 8 Jun 2023
Priority: JP 2022-09419910 Jun 2022
Published: US 2023/0399188 A114 Dec 2023
Granted: 22 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

B65H 9/002
Registering, e.g. orientating, articles; Devices therefor: changing orientation of sheet by only controlling movement of the forwarding means,…
B65H 9/006
Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet: the stop being formed by forwarding means in stand-by
B65H 5/06
Feeding articles separated from piles; Feeding articles to machines: by rollers or balls, e.g. between rollers
B65H 9/008
Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet: the stop being formed by reversing the forwarding means