Brushing – scrubbing – and general cleaning – Machines – Wiping
Patent
1975-03-31
1976-03-23
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Machines
Wiping
15102, 352130, 428293, 428302, B08B 1100
Patent
active
039450791
ABSTRACT:
A cleaning fabric having a contact surface against which the surface of a photographic film can be rubbed to remove foreign particles from the film. The fabric is a laminate comprising a non-woven wiping layer of soft fine intersecting bonded fibers defining the contact surface. The fibers in the wiping layer are randomly spaced and disposed to provide openings in the wiping layer for receiving foreign particles, and the wiping layer is compacted in a direction normal to the contact surface so that few ends or loops of the fibers project past the wiping surface, thereby restricting shearing or tearing loose of the fibers by the edges of a passing photographic film. An open non-woven lofty backing layer is adhered to the surface of the wiping layer opposite the contact surface. The backing layer is formed of stiff resilient randomly spaced and disposed bonded fibers and is sufficiently thick so that the backing layer can be supported in a slightly compressed condition to evenly press the contact surface into intimate engagement with a photographic film and to maintain such contact by slight expansion or further compression to compensate for irregularities in the film.
REFERENCES:
patent: 3644953 (1972-02-01), Christiansen
Minnesota Mining and Manufacturing Company
Roberts Edward L.
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