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US 5,930,857 AGranted
Apparatus for cleaning a surface of a moving web
AssigneeEastman Kodak Company
InventorsFernando Ramos, Larry T. Shafer, Sharon A. Guzman
Life of this patent
Estimating the term…
Abstract
Apparatus for cleaning a surface of a moving web of material, particularly photosensitive web material. A particle transfer roller is disposed adjacent the moving web, and driven to a pre-determined speed approaching but not greater than a sensed speed of the moving web. A passive one-way clutch coupled to the particle transfer roller is engaged, such that when the driven particle transfer roller contacts the moving web, the moving web drives the particle transfer roller. A cleaning station is disposed adjacent the particle transfer roller so as to provide renewal of the particle transfer roller.
Claims9
An apparatus for cleaning a moving web, comprising:
- a web speed sensor sensing the speed of the moving web;
- a particle transfer roller rotatable about an axis and movable from (i) a first position wherein the particle transfer roller cleans the moving web through contact with the moving web to (ii) a second position wherein the particle transfer roller is spaced from the moving web;
- a driver driving the particle transfer roller to a pre-determined speed approaching but not equal to or greater than the sensed speed of the moving web when the particle transfer roller is in the second position;
- an actuator moving the driven particle transfer roller into contact with the moving web;
- and
- a mechanism associated with the particle transfer roller allowing the particle transfer roller to be driven by the moving web at a speed greater than the pre-determined speed when the particle transfer roller is in the first position.
3 more elements
An apparatus for cleaning a moving web having a first side and a second side, comprising:
- a web speed sensor sensing the speed of the moving web;
- a first particle transfer roller rotatable about a first axis and disposed on the first side of the web, said first particle transfer roller being movable from (i) a first position wherein the first particle transfer roller cleans the first side of the moving web through contact with the moving web to (ii) a second position wherein the first particle transfer roller is spaced from the moving web;
- a second particle transfer roller rotatable about a second axis and disposed on the second side of the web, said second particle transfer roller movable from (i) a third position wherein the second particle transfer roller cleans the second side of the moving web through contact with the moving web to (ii) a fourth position wherein the second particle transfer roller is spaced from the moving web, the second axis being substantially parallel to the first axis;
- a driver driving the first and second particle transfer rollers to a pre-determined speed approaching but not equal to or greater than the sensed speed of the moving web;
- an actuator moving the driven first and second particle transfer rollers into contact with the moving web;
- and
- a first and second mechanism associated with the first and second particle transfer rollers, respectively, allowing the first and second particle transfer rollers to be driven by the moving web at a speed greater than the pre-determined speed when the first and second particle transfer rollers are in the first and third position, respectively.
4 more elements
An apparatus for cleaning a moving web, comprising:
- (a) a web speed sensor sensing the speed of the moving web;
- (b) a first station, the first station including:
- (i) a first plurality of particle transfer rollers rotatable about a first axis and movable from a first position wherein the first plurality of particle transfer rollers clean the moving web through contact with the moving web to a second position wherein the first plurality of particle transfer rollers is spaced from the moving web,
- (ii) a first plurality of cleaning stations for cleaning the first plurality of particle transfer rollers when the first plurality of particle transfer rollers is in the second position,
- (iii) a plurality of drivers driving each of the first plurality of particle transfer rollers to a pre-determined speed approaching but not greater than the sensed speed of the moving web,
- (iv) a first actuator moving the driven first plurality of particle transfer rollers into the first position, and
- (v) a one-way passive clutch coupled with each of the first plurality of particle transfer rollers allowing each of the first plurality of particle transfer rollers to be driven by the moving web at a speed greater than the pre-determined speed when the first plurality of particle transfer rollers is in the first position;
- (c) a second station disposed downstream of the first station, the second station including:
- (i) a second plurality of particle transfer rollers rotatable about a second axis and movable from a third position wherein the second plurality of particle transfer rollers cleans the moving web through contact with the moving web to a fourth position wherein the second plurality of particle transfer rollers is spaced from the moving web,
- (ii) a second plurality of cleaning stations for cleaning the second plurality of particle transfer rollers when the second plurality of particle transfer rollers is in the fourth position, the second axis being substantially parallel to the first axis,
- (iii) a plurality of drivers driving each of the second plurality of particle transfer rollers to a pre-determined speed approaching but not greater than the sensed speed of the moving web,
- (iv) a second actuator moving the driven second plurality of particle transfer rollers into the third position, and
- (v) a one-way passive clutch coupled with each of the second plurality of particle transfer rollers allowing each of the second plurality of particle transfer rollers to be driven by the moving web at a speed greater than the pre-determined speed when the second plurality of particle transfer rollers is in the third position;
- and
- (d) a controller controlling the first and second acutators to alternately move the first and second plurality of particle transfer rollers in the first and third positions, respectively.
12 more elements
Dependencies are inferred from the claim text.