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US 6,684,447 B2Granted
Cleaning sponge roller
AssigneeAion Co., Ltd.
InventorsKoji Mihara, Shuki Gohda, Masao Ide, Koei Igarashi, Konomu Tokunaga, Hiroshi Miyaji
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AssigneeAion Co., Ltd.
InventorsKoji Mihara, Shuki Gohda, Masao Ide, Koei Igarashi, Konomu Tokunaga, Hiroshi Miyaji
Estimating the term…
A cleaning sponge roller is made of a polyvinyl acetal-based porous sponge having elasticity in a wet state and comprises a generally cylindrical roll body and a plurality of protrusions molded integrally on the periphery of the roll body. The cleaning sponge roller rotatingly cleans a material to be cleaned by contacting the top portions of the protrusions with the surface of the material and brushing off polishing residues found on the surface of the material. Each of the protrusions has a tapered protruding base portion extending from the periphery of the roll body, and a protruding end portion having almost the same sectional shape from the top end surface of the protruding base portion to the top portion.
A cleaning sponge roller made of a polyvinyl acetal-based porous sponge having elasticity in a wet state, comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
For wet cleaning or washing: using mainly scrubbing means, e.g. brushes
Using rotary cleaning members: rotating about an axis parallel to the surface
Reconditioning of record carriers; Cleaning of record carriers ; Carrying-off electrostatic charges: of disk carriers
Generic processes or apparatus for the manufacture or treatment of devices covered
Term ended 25 Jun 2019 (estimated)
1. Field of the Invention
The present invention generally relates to a cleaning sponge roller for removing fine particles such as abrasive grains, swarfs and scobs off the surface of a material. More particularly, the present invention relates to a sponge roller for cleaning a material surface in the process of producing substrates such as magnetic recording aluminum discs, semiconductor silicon wafera, and the like. The present invention also relates to a mold for forming the sponge roller.
2. Description of Related Art
FIG. 1(a) is a partially cut perspective view of a cleaning sponge roller according to a first embodiment of the present invention.
FIG. 1(b) is an enlarged perspective view of a protrusion of the sponge roller shown in FIG. 1(a).
FIG. 1(c) is a sectional view of the protrusion of the sponge roller shown in FIG. 1(b).
FIG. 1(a) is a partially cut perspective view of a cleaning sponge roller 1 according to a first embodiment of the present invention. The cleaning sponge roller 1 is made of a polyvinyl acetal-based porous material (PVAt-based porous material) which is elastic in a wet state but cured in a dry state. The PVAt-based porous material has excellent water absorption properties and water retention properties and presents preferable flexibility, suitable impact resilience, and good wear resistance.
The sponge roller 1 comprises a generally cylindrical roll body 3 and a plurality of protrusions 5 molded integrally on the periphery 3a of the roll body 3.
FIG. 1(b) and FIG. 1(c) illustrate an enlarged view of the protrusion 5 of the sponge roller 1 shown in FIG. 1(a). The protrusion 5 comprises a protruding base portion 11 protruding integrally from the periphery 3a of the roll body 3, and a protruding end portion 13 extending integrally from a top end surface 11b of the protruding base portion 11. A base end surface 11a of the protruding base portion 11 is included in the periphery 3a of the roll body 3. The top end surface 11b of the protruding base portion 11 and the base surface 13a of the protruding end portion 13 are the same.