Clean-room wipers
AssigneeIllinois Tool Woks Inc.
InventorBradley Lyon
Life of this patent
Estimating the term…
Abstract
Knitted clean-room wipers are formed in long strips with sealed borders along both side edges. The strips are fed longitudinally through a very vigorous washing process which places substantial strain on the material. After washing, the strip is cut into individual wipers whose cut edges are sealed to form individual clean-room wipers. The stretch of the wiper material in the longitudinal direction is substantially reduced so as to substantially increase the yield of acceptable wipers from the manufacturing process.
Claims15
A clean-room wiper strip, said wiper strip comprising
- an elongated body made of knitted synthetic fibers and having two opposed side edges with a fused border along each of said edges,
- said body having a knitting pattern consisting of wales and courses of multifilament yarn, said courses extending in the longitudinal direction of said elongated body,
- the percentage stretch of said body in said longitudinal direction being less than approximately 90% (ninety percent).
A clean-room wiper having very low levels of loose particles and metallic ions, said wiper comprising
- a rectilinear body made of knitted synthetic fibers and having four edges, each with a fused border along its length,
- said body having a knitting pattern consisting of wales and courses of multifilament yarn,
- said courses extending in a first direction and said wales extending in a second direction perpendicular to said first direction,
- the percentage stretch in the direction of said courses being less than approximately 90% (ninety percent).
Dependencies are inferred from the claim text.