Angularly adjustable web-supporting steering roller

Patent 4641770 Issued on February 10, 1987. Estimated Expiration Date:

April 26, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3315859

3435693

3540571

Web aligner
Patent #: 3973446
Issued on: 08/10/1976
Inventor: Vasilantone

Positionally constraining web support
Patent #: 3986650
Issued on: 10/19/1976
Inventor: Swanke , et al.

Belt tracking system
Patent #: 4174171
Issued on: 11/13/1979
Inventor: Hamaker , et al.

Self-aligning roller for belt conveyors
Patent #: 4196803
Issued on: 04/08/1980
Inventor: Lovett

Belt tracking system
Patent #: 4344693
Issued on: 08/17/1982
Inventor: Hamaker

Belt alignment system Patent #: 4397538
Issued on: 08/09/1983
Inventor: Castelli , et al.

Inventor

Hediger, Edwin A.

Application

No. 06/727942 filed on 04/26/1985

US Classes:

226/23, Responsive to material-contacting element226/21Pivotally mounted roller

Examiners

Primary: Levy, Stuart S.
Assistant: Sohacki, Lynn M.

Attorney, Agent or Firm

Kessler; Lawrence P.

International Classes

B65G 39/16 (20060101)
B65G 39/10 (20060101)
B65H 23/02 (20060101)
G03G 15/00 (20060101)

Abstract

Mechanism for angularly adjusting a web-supporting steering roller of a web tracking apparatus about its steering axis in response to lateral movement of the supported web relative to the steering roller. In the web tracking apparatus, the web-supporting steering roller is mounted for rotation about its longitudinal axis and angular adjustment about a steering axis perpendicular to such longitudinal axis. The mechanism for angularly adjusting the steering roller comprises a lever assembly, for example, coupled to the steering roller for rotating such roller about the steering axis. Lateral movement of the web relative to the steering roller is sensed. A member, associated with the lever assembly and responsive to the sensing of lateral web movement, moves the lever assembly to rotate said steering roller for angular adjustment about the steering axis an amount corresponding to sensed lateral movement of the web. The member is located so that lateral movement of the web with the steering roller upon the angular adjustment of the roller is not imparted to the member.