JP2004069942A5

JP2004069942A5 -

Info

Publication number: JP2004069942A5
Application number: JP2002228072A
Authority: JP
Filing date: 2002-08-06
Publication date: 2005-10-27
Anticipated expiration: 2022-08-06

Claims

In an image forming apparatus for forming an image on a recording material,
An electrophotographic photosensitive drum, a developing unit for developing an electrostatic latent image formed on the electrophotographic photosensitive drum, and a container, are detachably mounted on the main body of the image forming apparatus. A process cartridge;
A transfer member for transferring the toner image developed by the developing means on the peripheral surface of the electrophotographic photosensitive drum to the recording material;
A detecting means for detecting the recording material before the recording material is conveyed to a transfer portion formed by the electrophotographic photosensitive drum and the transfer member, and the cartridge is mounted on the apparatus main body When the detection means is pressed against the bottom of the container, the detection means becomes a usable state,
An image forming apparatus comprising:

The image forming apparatus according to claim 1, wherein the detection unit is brought into a usable state by being pressed by an elastic member having elasticity provided at a bottom portion of the container.

Furthermore, the image forming apparatus
A first body electrical contact for taking out a detection signal from the detection means;
A second body electrical contact for transmitting the detection signal to a signal processing circuit provided in the apparatus body via the cartridge when the cartridge is mounted on the apparatus body;
The image forming apparatus according to claim 1, further comprising:

The cartridge is
A first cartridge electrical contact that is electrically connected to the first body electrical contact when the cartridge is mounted on the apparatus body;
A second cartridge electrical contact electrically connected to the first cartridge electrical contact, the second cartridge electrical contact being electrically connected to the second body electrical contact when the cartridge is mounted on the apparatus body; A cartridge electrical contact,
The image forming apparatus according to claim 3, further comprising:

The image according to any one of claims 1 to 4, wherein the detection means is a recording material surface roughness detection sensor that detects a surface roughness of an image forming surface on which an image of the recording material is formed. Forming equipment.

A process cartridge that is detachable from an image forming apparatus main body for forming an image on a recording material,
An electrophotographic photosensitive drum;
Developing means for developing the electrostatic latent image formed on the electrophotographic photosensitive drum;
A container,
A transfer member provided in the apparatus main body for transferring a toner image on the peripheral surface of the electrophotographic photosensitive drum developed by the developing unit to the recording material; A detecting means for detecting the recording material before the recording material is conveyed to a transfer portion formed with a photographic photosensitive drum, the cartridge provided at the bottom of the container being the device Detection means that becomes usable when attached to the main body,
A process cartridge comprising:

The detection means includes a light source that irradiates illumination light onto the surface of the recording material and a light receiving element that receives reflected light from the surface of the recording material, and optical that estimates the unevenness of the surface of the recording material from information on the reflected light The process cartridge according to claim 6, wherein the process cartridge is a surface roughness detection sensor.

The process cartridge according to claim 6, wherein the detection unit is a recording material thickness detection sensor that detects the thickness of the recording material.

The process cartridge according to claim 6, wherein the detection unit is a recording material capacitance detection sensor that detects a capacitance of the recording material.

The process cartridge according to claim 6, wherein the detection unit is a recording material front end passage timing detection sensor that detects a timing at which the front end of the recording material passes a predetermined position inside the apparatus.

The process cartridge according to claim 6, wherein the detection unit is an OHP sheet detection sensor for identifying whether the recording material is a transparent OHP sheet.