Back to results
US 4,598,849 AGranted
Web guiding and decurling apparatus
AssigneeBeloit Corporation
InventorsKenneth G. Frye, Arthur T. Karis
Life of this patent
Estimating the term…
Abstract
A paper web carrying apparatus is provided which combines a decurling apparatus, an edge sensing and compensating apparatus, a tension sensing apparatus and a slack edge compensation apparatus onto a single pivoting frame to increase the accuracy and lower the cost of directing paper web to a high speed sheeter. All of the components are either carried on the roller supporting pivot frame or an abutting support bracket.
Claims12
A device for guiding webs of paper material to a high speed sheeter comprising:
- a guide frame having a top horizontal roller over which the paper web passes and a bottom horizontal roller over which the paper web passes downstream of said top roller,
- a pair of spaced stationary side walls,
- a support bracket secured to said side walls,
- said guide frame pivotally mounted on said support brackets to pivot in a substantially vertical plane,
- means mounted between said walls downstream from and adjacent to said bottom roller for detecting the edge position of the paper web,
- said detecting means producing an error signal when the web's edge deviates from a desired position,
- means controlled by said error signal to cause said frame to pivot thereby moving said bottom roller to cause said web edge to return to the desired position,
- means mounted on said frame downstream of said top roller and upstream of said bottom roller for decurling the paper web as it passes through said frame, and
- means for sensing the tension of the paper web as it passes through said frame including a support bar,
- roller means carried on said support bar for engaging said frame to restrain said frame against movement other than pivotal movement about said pin,
- said support bar being pivotally mounted to said stationary walls to pivot in response to engagement force between said frame and said roller means, and
- means for measuring pivotal movement of said support bar.
9 more elements
A device for guiding webs of paper material to a high speed sheeter comprising:
- a guide frame having a top horizontal roller over which the paper web passes and a bottom horizontal roller over which the paper web passes downstream of said top roller,
- a pair of spaced stationary side walls,
- a support bracket secured to said side walls,
- said guide frame being orientated in a substantially vertical position and being pivotally mounted on a said support bracket to pivot in a substantially vertical plane with an axis of rotation of said frame perpendicular to and intersecting an axis of rotation of said top roller,
- said bottom roller carried on a shaft which is pivotally mounted at one end and is vertically adjustably mounted at a second end such that the roller can be selectively moved in and out of parallel relation to said upper roller thereby resulting in different path lengths between corresponding ends of said two rollers,
- means mounted between said walls downstream and adjacent to said bottom roller for detecting the edge position of the paper web,
- said detecting means producing an error signal when the web deviates from a desired position,
- means controlled by said error signal to cause said frame to pivot thereby moving said bottom roller to cause said web edge to return to the desired position,
- means mounted on said frame downstream of said top roller and upstream of said bottom roller for decurling the paper web as it passes through said frame, and
- means for sensing the tension of the paper web as it passes through said frame including
- a support bar,
- roller means carried on said support bar for engaging said frame to restrain said frame against movement other than pivotal movement about said pin,
- said support bar being pivotally mounted to said stationary walls to pivot in response to engagement force between said frame and said roller means, and
- means for measuring pivotal movement of said support bar.
11 more elements
A device for guiding webs of paper material to a high speed sheeter comprising:
- a pair of spaced stationary side walls,
- a support bracket secured to said side walls,
- a swing guide frame substantially vertically supported on a substantially horizontal pivot pin mounted on said support bracket,
- said guide frame having a top horizontal roller over which the paper web passes and a bottom roller over which the paper web passes downstream of said top roller,
- means mounted between said side walls downstream from and adjacent to said bottom roller for detecting the edge position of the paper web,
- said detecting means producing an error signal when the web's edge deviates from a desired position,
- means controlled by said error signal to cause said frame to pivot thereby moving said bottom roller to cause said web edge to return to the desired position,
- means mounted on said frame downstream of said top roller and upstream of said bottom roller for decurling the paper web as it passes through said frame, and
- means for sensing the tension of the paper web as it passes through said frame including
- a support bar,
- roller means carried on said support bar for engaging said frame to restrain said frame against movement other than pivotal movement about said pin,
- said support bar being pivotally mounted to said stationary walls to pivot in response to engagement force between said frame and said roller means, and
- means for measuring pivotal movement of said support bar.
10 more elements
Dependencies are inferred from the claim text.