Apparatus for cleaning particulate matter from a moving web

Claim 2

Apparatus for cleaning particulate matter from a moving web, said apparatus comprising: means for engaging the surface of said web to be cleaned, said engaging means including at least a first end formed as a thin blade of magnetically attractable material and a second end, said second end being supported in a floating pivot so as to enable said blade to self align with said web; and means, located adjacent to the surface of said web opposite to said surface to be cleaned, for inducing a magnetic field which attracts said thin blade end of said engaging means and holds said thin blade end in cleaning contact with said web.

Claim 3

In an electrostatographic reproduction device wherein an electrostatic latent image charge pattern of information to be reproduced is formed on a moving dielectric web, such pattern is developed with pigmented marking particles for forming a transferable image, and such transferable image is thereafter transferred to a receiver member, apparatus for cleaning residual marking particles from said electric web after transfer, said apparatus comprising; a continuous belt having at least one edge formed of magnetically attractable material; means for supporting said belt so that a marginal edge thereof is in juxtaposition with said web, said belt support means including a pair of rollers about which said continuous belt is entrained; means for rotating at least one of said rollers to transport said belt in a direction transverse to the direction of movement of said web; an electrically biased plate located between runs of said belt for establishing an electrostatic field for attracting any airborne marking particles to said belt; and means, located adjacent to the surface of said web opposite to said surface to be cleaned, for inducing a magnetic field which attracts said magnetically attractable portion of said belt and holds said portion in cleaning contact with said web.

Claim 4

In an electrostatographic reproduction device wherein an electrostatic latent image charge pattern of information to be reproduced is formed on a moving dielectric web, such pattern is developed with pigmented marking particles for forming a transferable image, and such transferable image is thereafter transferred to a receiver member, apparatus for cleaning residual marking particles from said electric web after transfer, said apparatus comprising; a continuous belt having at least one edge formed of magnetically attractable material; means for supporting said belt so that a marginal edge thereof is in juxtaposition with said web, said belt support means including a pair of rollers about which said continuous belt is entrained; means for rotating at least one of said rollers to transport said belt in a direction transverse to the direction of movement of said web; an electrically biased plate located between runs of said belt for establishing an electrostatic field for attracting any airborne marking particles to said belt; and means, located adjacent to the surface of said web opposite to said surface to be cleaned, for inducing a magnetic field which attracts said magnetically attractable portion of said belt and holds said portion in cleaning contact with said web.

Claim 5

The invention of claim 2 wherein said rollers are respectively located outboard of the marginal edges of said web, and further including a marking particle collection bottle and a skieve member, associated with said continuous belt and said collection bottle, to direct marking particles cleaned from the web by the belt from the belt into said collection bottle.