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US 8,824,953 B2Granted
Printing apparatus, sheet processing apparatus, and sheet winding device
AssigneeCanon Kabushiki Kaisha
InventorsKota Uchida, Manabu Kanazawa, Masahito Yoshida, Tetsuhiro Nitta, Takayuki Okamoto
Life of this patent
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Abstract
A device includes a winding rotary member having a cylindrical shape; a holder having a rotating member, which is provided in the vicinity of a cylindrical surface of the winding rotary member, capable of nipping and conveying the sheet; a first driving mechanism configured to rotate the winding rotary member; and a second driving mechanism configured to rotate the rotating member. The winding rotary member rotates with the sheet is nipped with the rotatable holder, whereby the sheet is wound around the winding rotary member.
Claims18
A device capable of winding a sheet thereupon, the device comprising:
- a winding rotary member having a cylindrical shape;
- a holder having a rotating member that is provided in a vicinity of a cylindrical surface of the winding rotary member, wherein the holder is capable of nipping and conveying a sheet;
- a detecting unit configured to detect an initial position of rotation of the winding rotary member relative to a lead-in path for the sheet to be lead into an internal space within the winding rotary member;
- a first driving mechanism configured to rotate the winding rotary member;
- and
- a second driving mechanism configured to rotate the rotating member,
- wherein the first driving mechanism rotates the winding rotary member with the sheet nipped by the holder, whereby the sheet is wound around the winding rotary member,
- wherein the first driving mechanism and the second driving mechanism operate at the same time, wherein the second driving mechanism coordinates rotation of the holder with rotation of the winding rotary member so that the holder draws the sheet into the internal space while the sheet is wound around the winding rotary member to reduce a possibility of a loop caused on a section of the sheet before the section of the sheet reaches the winding rotary member, and
- wherein, after a state in which the first driving mechanism and the second driving mechanism operate at the same time, the first driving mechanism continues its operation and the second driving mechanism stops its operation, whereby the holder stops drawing the sheet into the winding rotary member while the sheet is wound around the winding rotary member,
- wherein the winding rotary member is configured such that, a sheet winding speed, determined by a rotating speed of the winding rotary member, is maintained at a speed that is greater than a sheet conveying speed of the sheet received by the winding rotary member, whereby a whole sheet conveying speed principally is determined by the speed of the sheet conveying speed of the sheet to the winding rotary member.
7 more elements
A device capable of winding a sheet thereupon, the device comprising:
- a winding rotary member having a cylindrical shape;
- a holder having a rotating member that is provided in a vicinity of a cylindrical surface of the winding rotary member, wherein the holder is capable of nipping and conveying a sheet;
- a detecting unit configured to detect an initial position of rotation of the winding rotary member relative to a lead-in path for the sheet to be lead into an internal space within the winding rotary member;
- a first driving mechanism configured to rotate the winding rotary member;
- a second driving mechanism configured to rotate the rotating member;
- and
- a conveying mechanism configured to lead the sheet into the winding rotary member,
- wherein the first driving mechanism rotates the winding rotary member with the sheet nipped by the holder, whereby the sheet is wound around the winding rotary member, and
- wherein the conveying mechanism and the first driving mechanism are correlated by receiving control signals so that, at a time of winding the sheet led in by the conveying mechanism around the winding rotary member, a sheet winding speed determined by a rotating speed of the winding rotary member is greater than a sheet conveying speed of the sheet by the conveying mechanism, whereby a whole sheet conveying speed principally is determined by the speed of the conveying mechanism.
6 more elements
A device capable of winding a sheet thereupon, the device comprising:
- a winding rotary member having a cylindrical shape;
- a holder having a rotating member that is provided in a vicinity of a cylindrical surface of the winding rotary member, wherein the holder is capable of nipping and conveying a sheet;
- a first driving mechanism configured to rotate the winding rotary member;
- a second driving mechanism configured to rotate the rotating member;
- and
- a conveying mechanism configured to discharge the sheet from the winding rotary member,
- wherein the winding rotary member rotates with the sheet nipped by the holder, whereby the sheet is wound around the winding rotary member, and
- wherein the conveying mechanism and the first driving mechanism are correlated by receiving control signals so that, at a time of discharging the sheet wound out from the winding rotary member by the conveying mechanism, a sheet winding speed determined by a rotating speed of the winding rotary member is smaller than a sheet conveying speed by the conveying mechanism, whereby a whole sheet conveying speed of the sheet principally is determined by the speed of the conveying mechanism.
5 more elements
A device capable of winding a sheet thereupon, the device comprising:
- a winding rotary member having a cylindrical shape;
- a holder having a rotating member that is provided in a vicinity of a cylindrical surface of the winding rotary member, wherein the holder is capable of nipping and conveying a sheet;
- a first driving mechanism configured to rotate the winding rotary member;
- and
- a second driving mechanism configured to rotate the rotating member,
- wherein the winding rotary member rotates with the sheet nipped by the holder, whereby the sheet is wound around the winding rotary member, and
- wherein a rotational angle speed of a driving motor included in the first driving mechanism is changed according to received control signals based on a wound thickness of a roll of the sheet wound around the winding rotary member.
4 more elements
Dependencies are inferred from the claim text.