Transport assembly with driven split nip rollers

a technology of nip rollers and transport assemblies, which is applied in the direction of transportation and packaging, thin material processing, article separation, etc., can solve the problems of rollers that fail more quickly, jams and other problems, and the difficulty of spacing the nip rollers to accommodate different thicknesses of the web, etc., and achieves the effect of convenient modification

Inactive Publication Date: 2005-12-15
FOLDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is a new and improved paper web transport assembly that solves many of the problems of current assemblies. It can accommodate paper with different thicknesses across the width of the web and provides better control with more than two individually adjustable trolley-mounted nip rollers. The geometry and positioning of the trolleys relative to the drive roller enable roller to frictionally drive all of them even though they are positioned at different distances from the drive roller to provide different nip gaps in their respective nip gap zones. The invention can easily be modified to accommodate additional individually adjustable nip roller assemblies while still being actively driven."

Problems solved by technology

In the prior art, there is difficulty in spacing the nip rollers to accommodate different thicknesses of the web, particularly where on only drive roller and only one nip roller is provided across the entire width of the traveling web.
More specifically, rollers that span across the entire width of a web that has different thickness will wear unevenly causing the roller to fail more quickly.
This can cause paper skewing resulting in jams and other problems.
Thus, a third adjustable zone is not easily feasible because driving a shaft location in the middle of the assembly, from the outer two shafts, is not easily achievable because the lateral space taken by the bearing supports on the trolley shafts is considerable thereby resulting in dead space.
Thus, prior art assembly 50 suffers from the disadvantage of having only one roller 56 on one side of the web 54 that is actively driven which reduces the amount of control over web transport.
In view of the foregoing, the transport assemblies of the prior art suffer from various disadvantages that make them difficult and awkward to use with unexpected results.

Method used

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  • Transport assembly with driven split nip rollers
  • Transport assembly with driven split nip rollers
  • Transport assembly with driven split nip rollers

Examples

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Embodiment Construction

[0026] Referring first to FIG. 3, a perspective view of the paper web transport assembly 100 of the present invention is shown. A first drive roller 102 is provided on a first side of the traveling web 104 of paper. A number of nip rollers 106a-d on individual trolleys 108a-d (as seen in FIG. 4) are provided on a second side of the web 104. These nip rollers 106a-d are not merely idling rollers, as in the prior art, but are actively driven rollers. The active driving of the nip rollers 106a-d is carried out by the use of a drive roller, namely a second drive roller 110 that is positioned to be in frictional communication with each of the nip rollers 106a-d. Thus, the second drive roller 110 causes the nip rollers 106a-d to actively rotate to assist in movement of the web 104 in conjunction with the first drive roller 102.

[0027] As can be seen in FIG. 3, the single second drive roller 110 can drive a larger number of nip rollers 106a-d across the width of the web 104 for added flexi...

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Abstract

A transport assembly with a driven split rollers and split nip gap includes a support and a first drive roller that is rotatably mounted to the support about a first drive roller axis. The first drive roller is driven by gears, belts or the like for rotating the first drive roller about its axis. A number of nip rollers are adjustably mounted to the support and positioned in spaced apart relation and adjacent to the first drive roller with the first drive roller being in frictional communication with each nip roller with the nip rollers being driven by the first drive roller. A second drive roller is rotatably mounted to the support and is positioned a distance from the each of the first nip rollers to define a split nip gap for receiving and transporting a web therethrough. The nip gap distance between each of the nip rollers is individually adjustable while being directly driven by the first drive roller.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority from prior U.S. Provisional Application Ser. No. 60 / 577,718 filed on Jun. 7, 2004.BACKGROUND OF THE INVENTION [0002] This invention relates generally to transport assemblies, namely, assemblies for transporting paper and other web media. More specifically, the present invention relates to a new and novel transport assembly that includes split nip rollers that are driven to provide a split nip gap with adjustable gap across the width of the web. [0003] This invention relates to the control of a web, such as paper other web media, through a folding machine or printing apparatus. It should be understood that the present invention relates to transport of any type of media but paper, in particular, will be discussed in detail. This in no way limits the scope of the present invention to paper transport and it is intended that the present invention can be employed for transport of any type of web. [0004] In pri...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): B65H20/00B65H20/02B65H5/04B65H5/02
CPCB65H20/02B65H2403/10B65H2404/14
InventorRESLOW, LEIF F.
OwnerFOLDEX