§
Luxuse
Patent Intelligence
Sign In
Patent US4490948A successfully refreshed from Google Patents.
← Back to Patent Explorer
US4490948A Expired / Lapsed US ⏱️ 0.0 years remaining

Polishing plate and method for polishing surfaces

Assignee: Roehm GmbH Darmstadt
•
Filing: 1982-07-06
•
Granted: 1985-01-01
•
Expires: 2002-07-06
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A polishing plate for polishing the surface of synthetic resins has a rigid disk and a compressible cover abutting a lower surface of the rigid disk. The rigid disk has an inlet opening formed centrally therein and a plurality of channels formed in the lower surface thereof. The cover has a plurality of layers including an upper layer of soft foam adjacent the lower surface of the rigid disk, a lower layer having a textile surface structure and which contacts a surface to be polished, and a middle layer which is permeable to liquid and interposed between the upper and lower layers. A method of polishing a surface has as its first step supplying a polishing agent to a central opening formed in a rigid disk. The polishing agent is then uniformly distributed to an upper portion of a cover which is adjacent a lower surface of the disk through a plurality of channels formed in the lower surface of the disk, the channels communicating with the central opening to allow the polishing agent to flow therethrough. Next, the polishing agent is supplied to a lower portion of the cover through a plurality of access openings formed in the cover and disposed below the channels. The polishing agent is then uniformly applied to the surface to be polished by permeation of the polishing agent through the lower portion of the cover.

Inventors

  • 👤 Friedrich Hanstein
  • 👤 Peter R. Szigeti

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 19:36
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/14; B24D13/18

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 150 words
A polishing plate for polishing with liquid polishing agents containing polishing powder comprising: a rigid disk having a central polishing agent inlet opening formed therein and a lower surface having a plurality of channels formed therein communicating at one end with said inlet opening and extending radially outwardly from said inlet opening to distribute the liquid polishing agent along said lower surface; and a compressible cover abutting the lower surface of said rigid disk and having a plurality of layers including an upper layer of soft foam adjacent the lower surface of said rigid disk, an unperforated lower layer having a textile surface structure and which contacts a surface to be polished, and a middle layer, permeable to liquid, interposed between said upper and lower layers, said compressible cover being formed so that the polishing agent can pass therethrough to the textile surface which contacts the surface to be polished.
Claim 2
Dependent Claim 150 words
A polishing plate for polishing with liquid polishing agents containing polishing powder comprising: a rigid disk having a central polishing agent inlet opening formed therein and a lower surface having a plurality of channels formed therein communicating at one end with said inlet opening and extending radially outwardly from said inlet opening to distribute the liquid polishing agent along said lower surface; and a compressible cover abutting the lower surface of said rigid disk and having a plurality of layers including an upper layer of soft foam adjacent the lower surface of said rigid disk, an unperforated lower layer having a textile surface structure and which contacts a surface to be polished, and a middle layer, permeable to liquid, interposed between said upper and lower layers, said compressible cover being formed so that the polishing agent can pass therethrough to the textile surface which contacts the surface to be polished.
Claim 3
Dependent Claim 32 words
A polishing plate as defined in claim 1 wherein said upper layer has formed therein a plurality of access openings disposed below and in communication with said channels of said rigid plate.
Claim 4
Dependent Claim 33 words
A polishing plate as defined in claim 2 wherein said middle layer has formed therein a plurality of access openings disposed below and in communication with said access openings of said upper layer.
Claim 5
Dependent Claim 28 words
A polishing plate as defined in claim 1 wherein said channels of said rigid disk have diameters which decrease in a radially outward direction from said central opening.
Claim 6
Dependent Claim 36 words
A polishing plate as defined in claim 4 wherein said channels have approximately zero diameter at an edge portion of said disk and wherein adjacent channels converge to interconnect at a central portion of said disk.
Claim 7
Dependent Claim 49 words
A polishing plate as defined in claim 1 wherein the diameters of said upper, middle and lower layers are successively increasing and greater than that of said rigid disk and wherein said upper, middle and lower layers extend over an edge of said rigid disk to form a bead.
Claim 8
Dependent Claim 24 words
A polishing plate as defined in claim 6 wherein at least one of said layers extends to an upper surface of said rigid disk.
Claim 9
Dependent Claim 18 words
A polishing plate as defined in claim 1 wherein said upper layer comprises a soft synthetic resin foam.
Claim 10
Dependent Claim 18 words
A polishing plate as defined in claim 1 wherein said middle layer comprises a voluminous non-woven textile material.
Claim 11
Dependent Claim 18 words
A polishing plate as defined in claim 1 wherein said lower layer comprises a finely woven textile material.

References Cited (Backward Citations)

US2496033A Cited
US2567782A Cited
US2644280A Cited
US3107456A Cited
US3345281A Cited
US3754359A Cited
US3820904A Cited
US3875703A Cited
US4102084A Cited
GB2003770A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-01-01 1988-07-02 1989-01-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-01-01 1992-07-02 1993-01-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-01-01 1996-07-02 1997-01-01 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag