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Web processing apparatus

Inactive Publication Date: 2009-04-23
OCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]It is further known to correct for path length differences across a web, by using a separate gimbal assembly. Such a gimbal assembly forces a web back into its normal transport path by introducing a rotational degree of freedom in the web transport path, which is resiliently urged towards a desired equilibrium situation.
[0029]In another further embodiment, the torsion bar is formed such that it comprises a substantially cylindrical axial cross-section. A cylindrical formed axial cross-section of a torsion bar is in particular advantageous in configurations where the torsional load is applied in an axial and / or in process direction. Cylindrical torsion bars have in general a very simple construction and may be relatively cheap.

Problems solved by technology

Such arrangement call; however, not account for differences in path length across the width of the web, resulting in a variation in tension across the web.

Method used

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Embodiment Construction

[0046]The present invention will now be described with reference to the accompanying drawings, wherein the same reference numerals have been used to identify the same or similar elements throughout the several views.

[0047]FIG. 1 illustrates a printing device 10 for printing an image or text on a relatively large object, in particular on a relatively large and flat object. Such a printing device 10 is well known in the background art. The printing device 10 includes a support assembly 12 on which a printing surface 14 is arranged. As illustrated, the printing surface 14 may be provided with suction holes for pulling the object onto the printing surface 14 and thereby holding the object flat on the printing surface 14. A guiding assembly 16 is provided for supporting and guiding a carriage 18. The carriage 18 is movably supported by the guiding assembly 16 such that the carriage 18 may be moved over the printing surface 14. For example, the guiding assembly 16 may be movably supported...

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Abstract

A web tensioning assembly is configured to exert a tension on a web in a process direction and to balance the tension across a width of the web extending substantially in a direction perpendicular to the process direction. A web processing apparatus includes such a web tensioning assembly.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority under 35 U.S.C. §119(e) to U.S. Provisional Application No. 60 / 960,952, filed on Oct. 22, 2007, the entirety of which is expressly incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a web tensioning assembly configured to exert a tension on a web in a process direction and to balance the tension across a width of the web extending substantially in a direction perpendicular to the process direction. The present invention also pertains to a web processing apparatus comprising such a web tensioning assembly.[0004]2. Description of Background Art[0005]Web tensioning assemblies that exert a tension on a web in a process direction are known in the background art. An example of such assembly is a suspended roller assembly. Such assembly comprises a roller rotatably mounted on an axis that is mounted on two linkages, which are mounted f...

Claims

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Application Information

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IPC IPC(8): B65H23/16
CPCB65H23/02B65H23/16B65H2553/51B65H2404/1521B65H2404/15212B65H2404/1371
Inventor LANE, JOHN A.
Owner OCE TECH
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