APPARATUS FOR REDUCING WRINKLES IN MOVING WEB
First Claim
1. An apparatus for shaping a moving continuous web of print media in a printing system to reduce formation of wrinkles in the web of print media, comprising:
- a roller having an axis of rotation and a diameter, the roller including a first section, a second section, and a third section, the second section being located between the first section and the third section as viewed along the axis of rotation, the roller including a profile as viewed along the axis of rotation in which the diameter of the roller in the first section and the diameter of the roller in the third section are each greater than the diameter of the roller in the second section;
a non-rotating vacuum assembly having an arcuate surface including a first section, a second section, and a third section, the second section being located between the first section and the third section, the arcuate surface including an extremum point located in the second section, the vacuum assembly providing a vacuum force proximate to the first side of the web of print media; and
the vacuum assembly being positioned along a media travel path immediately upstream relative to the roller, the first section, the second section, and the third section of the vacuum assembly corresponding to the first section, the second section, and the third section of the roller, wherein the contour of the arcuate surface of the vacuum assembly causes the web of print media, after leaving the vacuum assembly, to have a non-linear profile in a direction perpendicular to the media travel path so that the web of print media contacts the first section and the third section of the roller prior to contacting the second section of the roller.
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0 Petitions
Accused Products
Abstract
A print media moving apparatus includes a vacuum assembly positioned immediately upstream relative to a roller. The vacuum assembly has an arcuate surface including three sections with the second section located between the first and third sections. The arcuate surface includes an extremum in the second section. The roller, having a diameter and rotational axis, includes three sections with the second section located between the first and third section as viewed along the rotational axis. The diameter of the roller in the first and third sections is greater than in the second section. The three sections of the vacuum assembly correspond to the three sections of the roller such that the contour of the arcuate surface causes the print media, after leaving the vacuum assembly, to contact the first and third sections of the roller prior to contacting the second section of the roller.
3 Citations
15 Claims
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1. An apparatus for shaping a moving continuous web of print media in a printing system to reduce formation of wrinkles in the web of print media, comprising:
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a roller having an axis of rotation and a diameter, the roller including a first section, a second section, and a third section, the second section being located between the first section and the third section as viewed along the axis of rotation, the roller including a profile as viewed along the axis of rotation in which the diameter of the roller in the first section and the diameter of the roller in the third section are each greater than the diameter of the roller in the second section; a non-rotating vacuum assembly having an arcuate surface including a first section, a second section, and a third section, the second section being located between the first section and the third section, the arcuate surface including an extremum point located in the second section, the vacuum assembly providing a vacuum force proximate to the first side of the web of print media; and the vacuum assembly being positioned along a media travel path immediately upstream relative to the roller, the first section, the second section, and the third section of the vacuum assembly corresponding to the first section, the second section, and the third section of the roller, wherein the contour of the arcuate surface of the vacuum assembly causes the web of print media, after leaving the vacuum assembly, to have a non-linear profile in a direction perpendicular to the media travel path so that the web of print media contacts the first section and the third section of the roller prior to contacting the second section of the roller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification