US3777444A - Sanding block and abrasive envelope therefor - Google Patents

Sanding block and abrasive envelope therefor Download PDF

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Publication number
US3777444A
US3777444A US00216385A US3777444DA US3777444A US 3777444 A US3777444 A US 3777444A US 00216385 A US00216385 A US 00216385A US 3777444D A US3777444D A US 3777444DA US 3777444 A US3777444 A US 3777444A
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United States
Prior art keywords
abrasive
block
envelope
support block
combination according
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Expired - Lifetime
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US00216385A
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English (en)
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K Dunn
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/04—Hand tools or other devices for non-rotary grinding, polishing, or stropping resilient; with resiliently-mounted operative surface

Definitions

  • ABSTRACT Presented are two embodiments of a sanding block adapted to be inserted within an abrasive envelope configured to fit snugly around the block.
  • the block and envelope assembly are configured to expose an optimum amount of abrasive surface to a surface to be smoothed.
  • the block of one embodiment is preferably fabricated from a dense but flexible and resilient material which permits conformation of the abrasive surface of the assembly to a surface to be abraded, while the block of the second embodiment is preferably wedged, fabricated from a sponge-like material such as sponge rubber or polyurethane foam-type material, and beveled along lateral edges to provide a dual wedged configuration.
  • abrasive material such as sandpaper buy full sheets, which are generally larger than can conveniently be used. It is customary to cut such sheets into smaller portions for attachment to aholding frame. The necessity of folding and carefully cutting such sheets prior to use is time consuming and costly and it is, accordingly, another object of one aspect of the invention to provide as an article of manufacture a flexible envelope having abrasive surfaces and adapted to receive a flexible and resilient sanding block configured to compliment the interior of the abrasive envelope.
  • a still further object of the invention is the provision, I
  • abrasive envelope configured to nest with other similar abrasive envelopes to facilitate packing and shipping.
  • a still further object of the invention is to provide as an article of manufacture a flexible envelope having abrasive surfaces and lateral edges secured together along marginal portions to form a pocket in which to receive a dualwedged sanding block formed from a resiliently deformable and compressible material such as sponge rubber or polyurethane foam.
  • the invention comprises a flexible and resilient single or dual wedge-shaped block having flat sides tapering to a relatively sharp edge along one long side and conveniently fabricated from a dense spongelike synthetic resinous or natural material such as rubber.
  • the lateral edges of the block defining the limits of the flat sides are beveled to provide a sharp lateral edge.
  • the flexible and resilient single wedge-shaped block is adapted to fit into the hollow interior of an envelope having a configuration complimentary to the single wedge-shaped block, while the dual wedge-shaped block is adapted to slip into an envelope formed merely by doubling a strip of abrasive paper longitudionally and cementing the lateral edges.
  • the outside surfaces of both types of envelope are coated to provide abrasive surfaces similar to the abrasive surface of emery cloth or abrasive paper.
  • a number of envelopes say a half dozen, together with one of the flexible and resilient single wedge-shaped blocks, are packaged for sale. Thereafter, it is necessary for a user merely to buy additional abrasive envelopes in whatever quantity it is convenient for the particular user.
  • FIG. 1 is a perspective view illustrating one embodiment of the block and abrasive envelope assembly in an attitude of use.
  • FIG. 2 is a perspective view illustrating the abrasive envelope with the flexible and resilient supporting block partially extracted to show the relationship between these two parts.
  • FIG. 3 is a vertical sectional view through the assembly.
  • FIG. 4 is a vertical sectional view through an assembly of a plurality of abrasive envelopes in an attitude in which they would be nested for shipment or sale.
  • FIG. 5 is a plan view of the envelope in its flat devel oped form illustrating the configuration of the blank from which the envelope is formed and the areas thereof on which adhesive is disposed.
  • FIG. 6 is a perspective view illustrating substantially full size another embodiment of the block and abrasive envelope assembly in an attitude of use.
  • FIG. 7 is a plan view in reduced scale of a strip of abrasive paper before it is folded along the dash line to form a pocket. A layer of an appropriate adhesive is shown by stippling along lateral edges of the strip.
  • FIG. 8 is a side elevational view of the pocket formed by folding the strip of FIG. 7 upon itself.
  • FIG. 9 is a vertical sectional view taken in the plane indicated by the line 9 9 in FIG. 8.
  • FIG. 11 is an edge view of the dual-wedged sanding block illustrated in FIG. 10.
  • the abrasive envelope of the assembly illustrated in FIGS. 1 5 is conveniently fabricated from a flat'blank designated generally by the numeral 12 in FIG. 5, the blank having opposite side edges 13 and 14 which cooperate with adjacent fold or score lines 16 and 17, respectively, to define triangular tabs 18 and 19 which, when folded alongthe score lines at right angles to the broad surfaces 21 and 22, as illustrated in FIG. 2, may be securely fastened to each other by an appropriate adhesive 23 so as to form an abrasive envelope or pocket, the interior surfaces of which have a configuration that is complimentary to the exterior surfaces of the support block 3.
  • the envelope blank is preferably provided with a transversely extending fold line 25, which may be in the nature of a score line, to guide folding of the blank so that the opposite end edges 24 and 26 of the blank lie opposite each other when the envelope is formed.
  • the exterior surfaces of the portion 21 and 22 are coated with an abrasive material as indicated in FIGS. 1 and 2, which tightly adheres to the surface of the envelope and which may be used to abrade a surface requiring smoothing.
  • the entire sheet may be coated with an abrasive, either prior to blanking or subsequent thereto, so that even the tapered end edges are coated.
  • a unitary wedge shaped support block having relatively flat sides converging from a relatively thick edge to a relatively thin edge;
  • b a self-supporting envelope structure having an interior configured to receive the wedge shaped support block therewithin, said envelope being open at its end corresponding to the thick edge of said block and being closed at its end corresponding to the thin edge of said support block;
  • said envelope structure is formed from a single rectangular strip of material having an abrasive coating on one surface thereof, and a layer of adhesive along opposite longitudinal marginal edge portions of said strip whereby said adhesive coated portions overlap and abut in sealing relation when said strip is folded transversely midway between its ends to form a closed pocket to receive said support block.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
US00216385A 1972-01-10 1972-01-10 Sanding block and abrasive envelope therefor Expired - Lifetime US3777444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21638572A 1972-01-10 1972-01-10

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US3777444A true US3777444A (en) 1973-12-11

Family

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US00216385A Expired - Lifetime US3777444A (en) 1972-01-10 1972-01-10 Sanding block and abrasive envelope therefor

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US (1) US3777444A (enrdf_load_stackoverflow)
JP (1) JPS4881198A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975868A (en) * 1975-07-07 1976-08-24 Lloyd Botimer Sanding device
USD273758S (en) 1981-04-20 1984-05-08 Ali Frank F Holder for an abrasive surface
US4501096A (en) * 1982-12-30 1985-02-26 Lukianoff Sergei G Hand-held sanding device
USD298010S (en) 1985-08-08 1988-10-11 Smith Robert K Holder for abrasive cleaner
US4966609A (en) * 1989-04-07 1990-10-30 Uniroyal Plastics Co., Inc. Conformable abrasive article
USD355105S (en) 1993-04-20 1995-02-07 Ryobi Motor Products Corp. Abrasive pad
US20040038634A1 (en) * 2002-08-26 2004-02-26 3M Innovative Properties Company Corner sanding sponge
US20060135049A1 (en) * 2004-12-16 2006-06-22 Petersen John G Millwork sanding sponge
USD527974S1 (en) * 2004-12-16 2006-09-12 3M Innovative Properties Company Millwork sanding sponge
USD654127S1 (en) * 2010-09-10 2012-02-14 Dexter Blackstock Weight lifting grip
US20140352718A1 (en) * 2013-06-04 2014-12-04 David Lionheart Tile sponge
US9907374B2 (en) * 2014-03-07 2018-03-06 Home Depot Product Authority, Llc Apparatuses and methods for financial transaction card displays
USD926001S1 (en) * 2019-06-07 2021-07-27 Anthany Jacques Sanding device
US20240261937A1 (en) * 2023-02-07 2024-08-08 Shaoxing Ziyuan Polishing Co., Ltd. Composite abrasive paper

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493852A (en) * 1948-06-01 1950-01-10 Merit Products Inc Sanding block
US2595429A (en) * 1950-08-22 1952-05-06 Clarence D Trussell Hand sander
US2624161A (en) * 1951-08-16 1953-01-06 Harm D Snell Abrading tool
US2808687A (en) * 1955-03-09 1957-10-08 Howard S Brown Sanding tool
US2996850A (en) * 1959-12-11 1961-08-22 Herbert E Hoffman Scouring implement
US3129541A (en) * 1962-10-29 1964-04-21 Field Albert Abrasive tools
US3129540A (en) * 1961-11-27 1964-04-21 Fred G Valles Flexible sanding block
US3339562A (en) * 1964-01-28 1967-09-05 Rowe Colin Lenton Emery boards
US3623282A (en) * 1970-02-24 1971-11-30 Clarence D Norris Article of manufacture useful for conditioning a surface

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493852A (en) * 1948-06-01 1950-01-10 Merit Products Inc Sanding block
US2595429A (en) * 1950-08-22 1952-05-06 Clarence D Trussell Hand sander
US2624161A (en) * 1951-08-16 1953-01-06 Harm D Snell Abrading tool
US2808687A (en) * 1955-03-09 1957-10-08 Howard S Brown Sanding tool
US2996850A (en) * 1959-12-11 1961-08-22 Herbert E Hoffman Scouring implement
US3129540A (en) * 1961-11-27 1964-04-21 Fred G Valles Flexible sanding block
US3129541A (en) * 1962-10-29 1964-04-21 Field Albert Abrasive tools
US3339562A (en) * 1964-01-28 1967-09-05 Rowe Colin Lenton Emery boards
US3623282A (en) * 1970-02-24 1971-11-30 Clarence D Norris Article of manufacture useful for conditioning a surface

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975868A (en) * 1975-07-07 1976-08-24 Lloyd Botimer Sanding device
USD273758S (en) 1981-04-20 1984-05-08 Ali Frank F Holder for an abrasive surface
US4501096A (en) * 1982-12-30 1985-02-26 Lukianoff Sergei G Hand-held sanding device
USD298010S (en) 1985-08-08 1988-10-11 Smith Robert K Holder for abrasive cleaner
US4966609A (en) * 1989-04-07 1990-10-30 Uniroyal Plastics Co., Inc. Conformable abrasive article
USD355105S (en) 1993-04-20 1995-02-07 Ryobi Motor Products Corp. Abrasive pad
US20040038634A1 (en) * 2002-08-26 2004-02-26 3M Innovative Properties Company Corner sanding sponge
US7621802B2 (en) 2002-08-26 2009-11-24 3M Innovative Properties Company Corner sanding sponge
US20060135049A1 (en) * 2004-12-16 2006-06-22 Petersen John G Millwork sanding sponge
USD527974S1 (en) * 2004-12-16 2006-09-12 3M Innovative Properties Company Millwork sanding sponge
USD654127S1 (en) * 2010-09-10 2012-02-14 Dexter Blackstock Weight lifting grip
US20140352718A1 (en) * 2013-06-04 2014-12-04 David Lionheart Tile sponge
US9907374B2 (en) * 2014-03-07 2018-03-06 Home Depot Product Authority, Llc Apparatuses and methods for financial transaction card displays
USD926001S1 (en) * 2019-06-07 2021-07-27 Anthany Jacques Sanding device
US20240261937A1 (en) * 2023-02-07 2024-08-08 Shaoxing Ziyuan Polishing Co., Ltd. Composite abrasive paper

Also Published As

Publication number Publication date
JPS4881198A (enrdf_load_stackoverflow) 1973-10-30

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