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AssigneeCanon Kabushiki Kaisha
InventorsKatsunori Yokoyama, Kazushi Watanabe, Yoshihiro Ito
Estimating the term…
A process cartridge is detachably mountable on a main assembly of an electrophotographic image forming apparatus a laser beam emitter, a laser shutter, and a mover. The process cartridge includes a cartridge frame; an electrophotographic photosensitive member; a process device acting to the electrophotographic photosensitive member; a first contact part provided on the cartridge frame to determine the position of the process cartridge relative to the main assembly of the apparatus by contacting a fixing member provided on the main assembly of the apparatus in mounting the process cartridge to the main assembly of the apparatus; and a second contact part provided on the cartridge frame adjacent to the first contact part and contacting with the mover to move the laser shutter from the shutting position to the opening position in mounting step of the process cartridge to the main assembly of the apparatus.
A process cartridge detachably mountable on a main assembly of an electrophotographic image forming apparatus having laser beam emitting means to emit a laser beam, a laser shutter moveable between a shutting position to shut an optical path of the laser beam emitted from the laser beam emitting means and an opening position to retreat from the shutting position for allowing passage of the laser beam, and a moving member to move the laser shutter from the shutting position to the opening position, said process cartridge comprising:
An electrophotographic image forming apparatus onto which a process cartridge is detachably mountable for forming an image on a recording medium, comprising:
A process cartridge detachably mountable on a main assembly of an electrophotographic image forming apparatus having a laser beam emitting member to emit a laser beam, a laser shutter moveable between a shutting position to shut an optical path of the laser beam emitted from the laser beam emitting member and an opening position to retreat from the shutting position for allowing passage of the laser beam, a moving member to move the laser shutter from the shutting position to the opening position, a first guiding surface with a first bearing surface connected thereto, and a second guiding surface with a second bearing surface connected thereto, said process cartridge comprising:
An electrophotographic image forming apparatus onto which a process cartridge is detachably mountable for forming an image on a recording medium, comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
Prevention of damage or soiling, e.g. mechanical abrasion: shielding members, shutter, e.g. light, heat shielding, prevention of toner scattering
Using single radiation source per colour, e.g. lighting beams or shutter arrangements: using lasers
For the photosensitive element: protective arrangements for preventing damage
Electrography
Term ended 6 Nov 2018 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to a process cartridge and electrophotographic image forming apparatus using the same.
2. Related Background Art
FIG. 1 is a vertical section of an electrophotographic image forming apparatus.
FIG. 2 is an external perspective view of the apparatus illustrated in FIG. 1.
FIG. 3 is a cross-section of a process cartridge.
Hereinafter, the embodiments of the present invention will be described with reference to the drawings.
Next, desirable embodiments of the present invention will be described. In the following description, the "widthwise" direction of a process cartridge B refers to the direction in which the process cartridge B is installed into, or removed from, the main assembly of an image forming apparatus, and coincides with the direction in which a recording medium is conveyed. The "lengthwise" direction of the process cartridge B refers to a direction which intersects (substantially perpendicular to) the direction in which the process cartridge B is installed into, or removed from, the main assembly 14. It is parallel to the surface of the recording medium, and intersects (substantially perpendicular to) the direction in which the recording medium is conveyed. Further, the terms "left" or "right" refers to the left or right directions, relatively relative to the direction in which the recording medium is conveyed, as seen from above.
FIG. 1 is an electrophotographic image forming apparatus (laser beam printer) which embodies the present invention, depicting the general structure thereof; FIG. 2 is an external perspective thereof; and FIGS. 3 to 8 are drawings of process cartridges which embody the present invention. More specifically, FIG. 3 is a cross-section of a process cartridge; FIG. 4 is an external perspective view of the process cartridge; FIG. 5 is a right-hand side view of the process cartridge; FIG. 6 is a left-hand side view of the process cartridge; FIG. 7 is a perspective view of the process cartridge as seen from the top left direction; and FIG. 8 is a perspective view of the process cartridge as seen from the bottom left direction. In the following description, the "top" surface of the process cartridge B refers to the surface which faces upward when the process cartridge B is in the main assembly 14 of the image forming apparatus, and the "bottom" surface refers to the surface which faces downward.