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US 2013/0156477 A1Published application
Sheet punching device and image forming apparatus having sheet punching device
AssigneeCanon Kabushiki Kaisha
InventorsYusuke Obuchi, Kenichi Hayashi, Kiyoshi Watanabe, Rikiya Takemasa, Akito Sekigawa
Life of this patent
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Abstract
A sheet punching device comprises a first blade, a first die into which the first blade is fitted from a first surface of a sheet to form a punch hole in the sheet, a second blade, and a second die into which the second blade is fitted. The second blade is inserted into the punch hole formed by the first blade from a second surface of the sheet and fitted into the second die.
Claims8
A sheet punching device comprising:
- a punch which has a basal portion and a front end portion provided at an end of the basal portion, the front end portion having a first blade which is formed in one end of the front end portion and a second blade which is formed in other end, adjacent to the basal portion, of the front end portion, the first blade and the second blade moving together in a first direction and a second direction opposite to the first direction;
- a first die into which the first blade moved in the first direction is fitted to form a punch hole in the sheet and has an inlet end portion which is formed in the first die and through which the first blade starts to be fitted into the first die;
- and
- a second die into which the second blade moved in the second direction is fitted,
- wherein after the first blade punches the sheet, the second blade passes through the inlet end portion of the first die, and
- wherein the second blade is inserted into the punch hole formed by the first blade and fitted into the second die by a movement in the second direction.
3 more elements
An image forming apparatus comprising:
- an image forming unit configured to form an image on a sheet;
- and
- a sheet punching device which forms a punch hole in the sheet on which the image is formed, the sheet punching device comprising:
- a punch which has a basal portion and a front end portion provided at an end of the basal portion, the front end portion having a first blade which is formed in one end of the front end portion and a second blade which is formed in other end, adjacent to the basal portion, of the front end portion, the first blade and the second blade moving together in a first direction and a second direction opposite to the first direction;
- a first die into which the first blade moved in the first direction is fitted to form a punch hole in the sheet and has an inlet end portion which is formed in the first die and through which the first blade starts to be fitted into the first die;
- and
- a second die into which the second blade moved in the second direction is fitted,
- wherein after the first blade punches the sheet, the second blade passes through the inlet end portion of the first die, and
- wherein the second blade is inserted into the punch hole formed by the first blade and fitted into the second die by a movement in the second direction.
6 more elements
Dependencies are inferred from the claim text.