US 5,291,228 A · Image formation apparatus having tuck prevention control means

Abstract

In an image formation apparatus, a drum tuck prevention element prevents a cut paper, which is a transfer material, which is an image holding means, from being wound on a photosensitive drum with an electrostatic state. The drum tuck prevention element detects, according to various physical information, the occurrence of a drum tuck. The drum tuck prevent element includes a tuck estimation judgment element which produces drum tuck prevention control information in response to the physical information. The physical information can be selected from a digital data for exposing the drum, temperature and humidity data obtained by detection in an area surrounding of an apparatus main body, data for indicating a residual amount of a development element, data for detecting an electrostatic latent image formed on the drum and data for indicating a visual image formed on a surface of the drum.

Claims28

Dependent claims

An image information formation apparatus having a tuck prevention control element comprising:

an image holding body;
an image formation device adapted to form a visual image on said image holding body;
a transfer material transportation element supporting a transfer material and adapted to transport said transfer material to a transfer region;
a transfer device adapted to transfer said visual image formed on said image holding body to said transfer material;
and
a tuck prevention control element adapted to prevent said image holding body from supporting and transporting said transfer material after said transfer material has passed through said transfer region;
wherein
said tuck prevention control element includes a tuck estimation judgment element, and
said tuck estimation judgment element detects various kinds of physical information relating to an occurrence of a tuck along a longitudinal direction of said transfer material and generates tuck control prevention information in response to said physical information.

6 more elements

An image formation apparatus having a drum tuck prevention control element comprising:

a photosensitive body drum;
an image formation device adapted to form a visual image on said photosensitive body drum said image formation device including an electrostatic discharger;
an exposure device;
a development element;
a cut paper transportation belt adapted to support and transport a cut paper to a transfer region;
a transfer electrostatic element adapted to transfer said visual image which is formed on said photosensitive body drum to said cut paper;
and
a drum tuck prevention control element adapted to prevent said photosensitive body drum from supporting and transporting said cut paper after said cut paper has passed through said transfer region;
wherein
said drum tuck prevention control element includes a tuck estimation judgment element, and
said tuck estimation judgment element detects various kinds of physical information relating to an occurrence of a tuck along a longitudinal direction of said cut paper and generates tuck control prevention information in response to said physical information.

8 more elements

Dependencies are inferred from the claim text.

Image formation apparatus having tuck prevention control means

Life of this patent

Image formation apparatus having tuck prevention control means

Life of this patent

Abstract

Claims28