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US 5,655,175 AGranted
Developing apparatus having light transmitting window
AssigneeCanon Kabushiki Kaisha
InventorHaruhisa Oshida
Life of this patent
Estimating the term…
Abstract
A developing apparatus includes a developer container for containing a developer; a light transmitting portion, in the developer container, for optically detecting the developer; a rotatable wiping sheet for wiping the light transmitting portion; wherein the wiping sheet has a low rigidity portion at a rotational axis side beyond an end of the wiping sheet.
Claims16
A developing apparatus comprising:
- a developer container for containing a developer;
- a light transmitting portion in said developer container, for optically detecting the developer;
- and
- a rotatable wiping sheet for wiping said light transmitting portion;
- wherein said wiping sheet has a low rigidity portion at a rotational axis side beyond a wiping end of said wiping sheet, and wherein the low rigidity portion of said wiping sheet includes an opening therein.
2 more elements
A developing apparatus comprising:
- a developer container for containing a developer;
- a light transmitting portion in said developer container, for optically detecting the developer;
- and
- a rotatable wiping sheet for wiping said light transmitting portion;
- wherein said wiping sheet has a low rigidity portion at a rotational axis side beyond a wiping end of said wiping sheet, and wherein low rigidity portion said wiping sheet includes a narrow portion formed therein.
2 more elements
A developing apparatus comprising:
- a developer container for containing a developer;
- a light transmitting portion, in said developer container, for optically detecting the developer;
- and
- a rotatable wiping sheet for wiping said light transmitting portion;
- wherein said wiping sheet has a low rigidity portion at a rotational axis side beyond a wiping end of said wiping sheet, and wherein a first distance m initially exists between an end of said wiping sheet and the position of the low rigidity portion, a second distance M is established between an end of said wiping sheet and the position of the low rigidity portion for increasing the contact angle between said wiping sheet and said light transmitting portion, a length N between a supporting position of said wiping sheet and an end thereof, and an entrance amount d of said wiping sheet into the light transmitting portion, satisfy:
- ##EQU4##
3 more elements
An image forming apparatus comprising:
- an image bearing member for bearing an electrostatic image;
- developing means for developing the electrostatic image on said image bearing member, said developing means including a developer container for containing a developer;
- a light transmitting portion, in said developer container, for optically detecting the developer;
- and a rotatable wiping sheet for wiping said light transmitting portion;
- wherein said wiping sheet has a low rigidity portion at a rotational axis side beyond a wiping end of said wiping sheet, on an optical axis for detecting the developer through said light transmitting portion, wherein the low rigidity portion of said wiping sheet includes an opening therein;
- and
- an optical element for detecting a developer through said light transmitting portion.
4 more elements
An image forming apparatus comprising:
- an image bearing member for bearing an electrostatic image;
- developing means for developing the electrostatic image on said image bearing member, said developing means including a developer container for containing a developer;
- a light transmitting portion, in said developer container, for optically detecting the developer;
- and a rotatable wiping sheet for wiping said light transmitting portion;
- wherein said wiping sheet has a low rigidity portion at a rotational axis side beyond a wiping end of said wiping sheet, on an optical axis for detecting the developer through said light transmitting portion, wherein the low rigidity portion of said wiping sheet includes a narrow portion formed therein;
- and
- an optical element for detecting a developer through said light transmitting portion.
4 more elements
An image forming apparatus comprising:
- an image bearing member for bearing an electrostatic image;
- developing means for developing the electrostatic image on said image bearing member, said developing means including a developer container for containing a developer;
- a light transmitting portion, in said developer container, for optically detecting the developer;
- and a rotatable wiping sheet for wiping said light transmitting portion;
- wherein said wiping sheet has a low rigidity portion at a rotational axis side beyond a wiping end of said wiping sheet, on an optical axis for detecting the developer through said light transmitting portion;
- and
- an optical element for detecting a developer through said light transmitting portion,
- wherein a first distance m initially exists between an end of said wiping sheet and the position of the low rigidity portion, a second distance M is established between an end of said wiping sheet and the position of the low rigidity portion for increasing the contact angle between said wiping sheet and said light transmitting portion, a length N between a supporting position of said wiping sheet and an end thereof, and an entrance amount d of said wiping sheet into the light transmitting portion, satisfy:
- ##EQU5##
6 more elements
A developing apparatus comprising:
- a developing device having an opening and a developer carrying member for carrying a developer;
- a developer container, adjacent said developing device, for containing a developer;
- and
- a rotatable rubbing sheet for rubbing an internal surface of said developer container to feed the developer from said developer container to said developing device;
- wherein said rubbing sheet has a low rigidity portion at a rotational axis side beyond a wiping end of said wiping sheet, and
- wherein the low rigidity portion of said rubbing sheet includes an opening formed therein.
3 more elements
A developing apparatus comprising:
- a developing device having an opening and a developer carrying member for carrying a developer;
- a developer container, adjacent said developing device for containing a developer;
- and
- a rotatable rubbing sheet for rubbing an internal surface of said developer container to feed the developer from said developer container to said developing device;
- wherein said rubbing sheet has a low rigidity portion at a rotational axis side beyond a wiping end of said rubbing sheet, and
- wherein the low rigidity portion of said rubbing sheet includes a narrow portion formed therein.
3 more elements
A developing apparatus comprising:
- a developing device having an opening and a developer carrying member for carrying a developer;
- a developer container, adjacent said developing device, for containing a developer;
- and
- a rotatable rubbing sheet for rubbing an internal surface of said developer container to feed the developer from said developer container to said developing device;
- wherein said rubbing sheet has a low rigidity portion at a rotational axis side beyond a wiping end of said wiping sheet, and
- wherein a first distance m initially exists between an end of said wiping sheet and the position of the low rigidity portion, a second distance M is established between an end of said rubbing sheet and the position of the low rigidity portion for increasing the contact angle between said wiping sheet and said light transmitting portion, a length N between a supporting position of said rubbing sheet and an end thereof, and an entrance amount d of said rubbing sheet into the light transmitting portion, satisfy:
- ##EQU6##
4 more elements
Dependencies are inferred from the claim text.