Intermediate transfer blanket for use in electrophotographic printing
An intermediate transfer blanket for use in an electrophotographic imaging apparatus is provided which includes an inner body portion having at least one reinforcing layer, and an outer body portion having at least one reinforcing layer and an electrophotographic image transfer face, where the outer body portion is releasably securable to the inner body portion. The blanket construction allows the printing surface to be removed from the blanket and easily replaced in a cost effective manner.
1 . An intermediate transfer blanket for use in an electrophotographic imaging apparatus comprising:
an inner body portion comprising at least one reinforcing layer;
an outer body portion comprising at least one reinforcing layer and a release layer having an electrophotographic image transfer face, said outer body portion being releasably securable to said inner body portion.
2 . The intermediate transfer blanket of claim 1 wherein said reinforcing layer is selected from the group consisting of fabric, plastic film, metal, screening, and fiberglass.
3 . The intermediate transfer blanket of claim 2 wherein said reinforcing layer comprises a woven fabric.
4 . The intermediate transfer blanket of claim 1 wherein said reinforcing layer has a thickness of between about 200 to about 400 micrometers.
5 . The intermediate transfer blanket of claim 1 wherein said outer body portion further comprises a conductive layer overlying said reinforcing layer, a conforming layer overlying said conductive layer, and a release layer overlying said conforming layer.
6 . The intermediate transfer blanket of claim 5 wherein said conductive layer comprises a polymeric material selected from acrylic elastomers, nitrile rubber, urethanes, vinyl, and silicone, said layer containing a conductive material therein.
7 . The intermediate transfer blanket of claim 5 wherein said conductive material comprises carbon black.
8 . The intermediate transfer blanket of claim 5 wherein said conductive layer has a resistance of less than about 1000 k ohms/square.
9 . The intermediate transfer blanket of claim 5 wherein said conductive layer has a resistance of between about 20 k ohms/square and about 50 k ohms/square.
10 . The intermediate transfer blanket of claim 5 wherein said conforming layer comprises an elastomer having a Shore D hardness of less than about 70.
11 . The intermediate transfer blanket of claim 5 wherein said conforming layer has a minimum Shore A hardness of 30.
12 . The intermediate transfer blanket of claim 5 wherein said conforming layer includes a conductive material therein.
13 . The intermediate transfer blanket of claim 5 wherein said release layer comprises a silicone-based material.
14 . The intermediate transfer blanket of claim 5 wherein said release layer comprises a fluoropolymer.
15 . The intermediate transfer blanket of claim 5 wherein said release layer includes a conductive material therein.
16 . The intermediate transfer blanket of claim 1 wherein said outer body portion further comprises a barrier layer.
17 . The intermediate transfer blanket of claim 1 wherein said inner body portion further includes a cushion layer overlying said reinforcing layer.
18 . The intermediate transfer blanket of claim 17 wherein said cushion layer comprises nitrile rubber.
19 . The intermediate transfer blanket of claim 17 wherein said cushion layer is adhered to said reinforcing layer.
20 . The intermediate transfer blanket of claim 17 wherein said cushion layer has a Shore A hardness of between about 35 and 55.
21 . The intermediate transfer blanket of claim 17 wherein said cushion layer has a conductive material therein.
22 . The intermediate transfer blanket of claim 17 wherein said cushion layer has voids therein.
23 . The intermediate transfer blanket of claim 1 wherein said blanket includes first and second ends, and said blanket is adapted to be secured in the non-print area of a blanket cylinder.
24 . The intermediate transfer blanket of claim 1 wherein said inner body portion further includes a cushion layer overlying said reinforcing layer, a conductive layer overlying said cushion layer, and a conforming layer overlying said conductive layer.
25 . The intermediate transfer blanket of claim 1 wherein said blanket is gapless.
26 . The intermediate transfer blanket of claim 25 including a cushion layer adhered to said inner body portion.
27 . The intermediate transfer blanket of claim 26 wherein said cushion layer comprises a nitrile rubber.
28 . The intermediate transfer blanket of claim 26 wherein said cushion layer includes a conductive material therein.
29 . The intermediate transfer blanket of claim 25 wherein said outer body portion has an inner diameter and is releasably securable to said inner body portion by expanding said inner diameter to fit over said inner body portion.
30 . The intermediate transfer blanket of claim 25 wherein said inner body portion has an inner diameter and is secured to a blanket cylinder by expanding said inner diameter of said inner body portion.
31 . The intermediate transfer blanket of claim 25 wherein said inner body portion includes a plurality of apertures therein.