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US 4,194,660 AGranted
Sheet feed tractor
AssigneeData Motion, Inc.
InventorAlan F. Seitz
Life of this patent
Estimating the term…
Abstract
A sheet-feed tractor is provided with raised land portions adjacent its drive and idler wheels. The raised land portions are positioned on the chassis of the tractor and shaped to form wall surfaces that are in radial registration with borders on a drive belt trained around the drive and idler wheels. The wall surfaces provide a positive means for preventing outward movement of the drive belt off the drive wheel and therefore prevent their disengagement.
Claims7
In a drive tractor for web material, the combination comprising:
- a. a chassis;
- b. a flexible endless belt mounted on said chassis, said belt having an inner driven surface and an outer driving surface and defining a closed path of travel;
- and
- c. belt driving means mounted on said chassis and including a rotatable member adapted to be rotated by a drive member, said rotatable member drivingly engaging said inner driven surface of said belt when said belts is in said path of travel;
- said chassis having wall means thereon adjacent said rotatable member and extending transversely of said belt and disposed outwardly of and closely adjacent said path of travel to limit the amount of deflection of said belt from said path and thereby prevent disengagement of said belt from said rotatable member.
2 more elements
Dependencies are inferred from the claim text.