Patent US5573619A successfully refreshed from Google Patents.
US5573619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a coated abrasive belt with an endless, seamless backing
Assignee: 3M Innovative Properties Co
•
Filing: 1993-10-29
•
Granted: 1996-11-12
•
Expires: 2013-10-29
Abstract
Abstract A coated abrasive backing consisting of an endless, seamless, loop is provided. The backing loop includes about 40-99% by weight of an organic polymeric binder, based upon the weight of the backing; and an effective amount of a fibrous reinforcing material engulfed within the organic polymeric binder material. The endless, seamless backing loop includes a length with parallel side edges, and at least one layer of fibrous reinforcing material engulfed within the organic polymeric binder material such that there are regions of organic binder material free of fibrous reinforcing material on opposite surfaces of the layer of fibrous reinforcing material. The fibrous reinforcing material can be in the form of individual fibrous strands, a fibrous mat structure, or a combination of the these. A method for preparing the endless, seamless backing loop for a coated abrasive belt is also provided. The method includes the steps of preparing a loop of liquid binder material having fibrous reinforcing material therein around the periphery of a drum; and solidifying the binder material such that an endless, seamless, backing loop having fibrous reinforcing material engulfed within the organic polymeric binder material is formed.
Inventors
- 👤 Harold W. Benedict
- 👤 Diana D. Zimny
- 👤 Donna W. Bange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:40
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D11/00; B24D11/001; B24D11/005; B24D11/02
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
143 words
A method for preparing a coated abrasive belt having an endless, seamless backing; the method comprising: (a) providing a support structure having an outer periphery (b) preparing a loop of liquid organic polymeric binder material having nonmetallic fibrous reinforcing material engulfed therein, in extension around the outer periphery of a support structure, comprising winding at least two fibrous reinforcing strands of at least two different nonmetallic compositions around the outer periphery of the support structure; (c) solidifying the liquid organic polymeric binder material to form a flexible, solidified, endless, seamless backing loop having about 40-99 wt-% solidified organic polymeric binder material with fibrous reinforcing material engulfed therein, generally parallel side edges, and inner and outer surfaces having generally no fibrous reinforcing material protruding therefrom; (d) applying an abrasive coating to the backing loop; and (e) moving the backing loop from the support structure.
Claim 2
Independent Claim
143 words
A method for preparing a coated abrasive belt having an endless, seamless backing; the method comprising: (a) providing a support structure having an outer periphery (b) preparing a loop of liquid organic polymeric binder material having nonmetallic fibrous reinforcing material engulfed therein, in extension around the outer periphery of a support structure, comprising winding at least two fibrous reinforcing strands of at least two different nonmetallic compositions around the outer periphery of the support structure; (c) solidifying the liquid organic polymeric binder material to form a flexible, solidified, endless, seamless backing loop having about 40-99 wt-% solidified organic polymeric binder material with fibrous reinforcing material engulfed therein, generally parallel side edges, and inner and outer surfaces having generally no fibrous reinforcing material protruding therefrom; (d) applying an abrasive coating to the backing loop; and (e) moving the backing loop from the support structure.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the solidified organic polymeric binder material is present in an amount of about 50-95 wt-%.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the fibrous reinforcing material comprises a plurality of distinct noninterlocking layers of fibrous reinforcing material.
Claim 5
Dependent Claim
30 words
The method of claim 1 wherein the fibrous reinforcing strands are coated with the liquid organic polymeric binder material prior to winding around the outer periphery of the support structure.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein at least one of the compositions of nonmetallic fibrous reinforcing strands comprises fiberglass.
Claim 7
Dependent Claim
32 words
The method of claim 1 wherein the step of winding the nonmetallic fibrous reinforcing strands comprises winding at a constant, nonzero angle relative to the parallel side edges of the backing loop.
Claim 8
Dependent Claim
24 words
The method of claim 1 wherein the nonmetallic fibrous reinforcing material is placed in a nonuniform fashion across the width of the backing loop.
Claim 9
Dependent Claim
21 words
The method of claim 7 wherein the nonmetallic fibrous reinforcing material is placed only near the center of the backing loop.
Claim 10
Dependent Claim
16 words
The method of claim 1 wherein the backing loop has a thickness of about 0.07-1.5 mm.
Claim 11
Dependent Claim
60 words
The method of claim 1 wherein prior to the step of preparing a loop of liquid organic polymeric binder material, the method comprises applying a sheet material to the outer periphery of the support structure, and the step of winding the fibrous reinforcing strands comprise winding the strands around the sheet material on the outer periphery of the support structure.
Claim 12
Dependent Claim
25 words
The method of claim 10 wherein the sheet material is selected from the group consisting of cloth, polymeric film, paper, vulcanized fiber, and nonwoven web.
Claim 13
Dependent Claim
12 words
The method of claim 11 wherein the sheet material includes a seam.
Claim 14
Dependent Claim
68 words
The method of claim 1 wherein the step of preparing a loop of liquid organic polymeric binder material, having nonmetallic fibrous reinforcing material engulfed therein, comprises: (a) applying a fibrous mat structure around the outer periphery of the support structure; and (b) winding least two fibrous reinforcing strands of at least two different nonmetallic compositions around the fibrous mat structure on the outer periphery of the support structure.
Claim 15
Dependent Claim
17 words
The method of claim 13 wherein the fibrous mat structure has individual parallel fibrous strands incorporated therein.
Claim 16
Dependent Claim
32 words
The method of claim 13 wherein the fibrous reinforcing mat structure is coated with the liquid organic polymeric binder material prior to being applied around the outer periphery of the support structure.
Claim 17
Dependent Claim
50 words
The method of claim 1 wherein the step of applying an abrasive coating comprises: (a) applying a first adhesive layer to the outer surface of the flexible endless, seamless backing loop; (b) applying abrasive material onto the first adhesive layer; and (c) at least partially solidifying the first adhesive layer.
Claim 18
Dependent Claim
12 words
The method of claim 16 wherein the abrasive material is applied electrostatically.
Claim 19
Dependent Claim
40 words
The method of claim 16 wherein the step of applying an abrasive coating further includes: (a) applying a second adhesive layer over the abrasive material and first adhesive layer; and (b) completely solidifying both the first and second adhesive layers.
Claim 20
Dependent Claim
20 words
The method of claim 1 wherein the liquid binder material comprises a urethane resin an epoxy resin or combinations thereof.
Claim 21
Dependent Claim
178 words
The method of claim 1 wherein the step of preparing a loop of liquid organic polymeric binder material, having nonmetallic fibrous reinforcing material engulfed therein, comprises: (a) applying a first layer of a solid organic polymeric binder material around the outer periphery of a support structure; (b) applying a layer of fibrous reinforcing material around the first layer of solid organic polymeric binder material on the outer periphery of the support structure by winding at least two strands of at least two different nonmetallic compositions around the solid organic polymeric binder material on the outer periphery of the support structure; (c) applying a second layer of a solid organic polymeric binder material around the first layer of solid organic polymeric binder material and the layer of fibrous reinforcing material on the support structure to form a structure of a solid organic polymeric binder material having a layer of fibrous reinforcing material therein; and (d) heating the solid organic polymeric binder material until it flows and generally forms a liquid organic polymeric binder material having fibrous reinforcing material therein.
Claim 22
Dependent Claim
14 words
The method of claim 1 wherein step (e) is carried out before step (d).
Claim 23
Dependent Claim
55 words
The method of claim 1 wherein the step of winding at least two fibrous reinforcing strands of at least two different nonmetallic compositions comprises winding them in an alternating fashion generally in the form of a helix in longitudinal extension around the length of the backing loop to form one layer of fibrous reinforcing material.
Claim 24
Independent Claim
185 words
A method for preparing a coated abrasive belt having an endless seamless backing; the method comprising: (a) providing a support structure having an outer periphery; (b) preparing a loop of liquid organic polymeric binder material, having fibrous reinforcing material engulfed therein, in extension around the outer periphery of a support structure; wherein: (i) the fibrous reinforcing material comprises a plurality of distinct noninterlocking layers of fibrous reinforcing material; and (ii) at least one of the distinct noninterlocking layers of fibrous reinforcing material comprises at least two fibrous reinforcing strands of at least two different nonmetallic compositions wrapped in longitudinal extension around the length of the loop; (c) solidifying the liquid organic binder material to form a flexible, solidified, endless, seamless loop having a thickness of about 0.07-1.5 mm and having about 40-99 wt-% solidified organic polymeric binder material with the plurality of distinct noninterlocking layers of fibrous reinforcing material engulfed therein, generally parallel side edges, and inner and outer surfaces having generally no fibrous reinforcing material protruding therefrom; (d) applying an abrasive coating to the loop; and (e) moving the loon from the support structure.
Claim 25
Independent Claim
185 words
A method for preparing a coated abrasive belt having an endless seamless backing; the method comprising: (a) providing a support structure having an outer periphery; (b) preparing a loop of liquid organic polymeric binder material, having fibrous reinforcing material engulfed therein, in extension around the outer periphery of a support structure; wherein: (i) the fibrous reinforcing material comprises a plurality of distinct noninterlocking layers of fibrous reinforcing material; and (ii) at least one of the distinct noninterlocking layers of fibrous reinforcing material comprises at least two fibrous reinforcing strands of at least two different nonmetallic compositions wrapped in longitudinal extension around the length of the loop; (c) solidifying the liquid organic binder material to form a flexible, solidified, endless, seamless loop having a thickness of about 0.07-1.5 mm and having about 40-99 wt-% solidified organic polymeric binder material with the plurality of distinct noninterlocking layers of fibrous reinforcing material engulfed therein, generally parallel side edges, and inner and outer surfaces having generally no fibrous reinforcing material protruding therefrom; (d) applying an abrasive coating to the loop; and (e) moving the loon from the support structure.
Claim 26
Dependent Claim
21 words
The method of claim 23 wherein the solidified organic polymeric binder material is present in an amount of about 50-95 wt-%.
Claim 27
Dependent Claim
70 words
The method of claim 23 wherein the step of preparing a loop of liquid organic polymeric binder material comprises: (a) applying a fibrous mat structure around the outer periphery of the support structure; and (b) winding at least two fibrous reinforcing strands of at least two different nonmetallic compositions around the fibrous mat structure on the support structure; wherein the fibrous strands and fibrous mat structure form distinct noninterlocking layers.
Claim 28
Dependent Claim
75 words
The method of claim 23 wherein the step of applying an abrasive coating comprises: (a) applying a first adhesive layer to the outer surface of the flexible endless, seamless loop; (b) applying abrasive material onto the first adhesive layer electrostatically; and (c) at least partially solidifying the first adhesive layer; (d) applying a second adhesive layer over the abrasive material and first adhesive layer; and (e) completely solidifying both the first and second adhesive layers.
Claim 29
Dependent Claim
58 words
The method of claim 23 wherein prior to the step of preparing a loop of liquid organic polymeric binder material, the method comprises applying a sheet material to the outer periphery of the support structure and the step of preparing a loop comprises preparing a loop around the sheet material on the outer periphery of the support structure.
Claim 30
Dependent Claim
25 words
The method of claim 27 wherein the sheet material is selected from the group consisting of cloth, polymeric film, paper, vulcanized fiber, a nonwoven web.
Claim 31
Dependent Claim
15 words
The method of claim 28 wherein at least one of the fibrous strands comprises aramid.
Claim 32
Dependent Claim
19 words
The method of claim 23 wherein the surfaces of the backing are sealed prior to applying the abrasive coating.
Claim 33
Dependent Claim
14 words
The method of claim 23 wherein step (e) is carried out before step (d).
Claim 34
Dependent Claim
54 words
The method of claim 25 wherein the step of winding at least two fibrous reinforcing strands of at least two different nonmetallic compositions comprises winding them in an alternating fashion generally in the form of a helix in longitudinal extension around the length of the loop to form one layer of fibrous reinforcing material.
References Cited (Backward Citations)
US25587A
Cited
US289879A
Cited
USRE25587E
Cited
US1412309A
Cited
US1676845A
Cited
US1924355A
Cited
US2032356A
Cited
US2349365A
Cited
US2233035A
Cited
US2209074A
Cited
US2404207A
Cited
US2356249A
Cited
US2356866A
Cited
US2391731A
Cited
US2411724A
Cited
US2468853A
Cited
US2590697A
Cited
US2682733A
Cited
US2712987A
Cited
US2704735A
Cited
US2785442A
Cited
US2773540A
Cited
US2743559A
Cited
US2999780A
Cited
US2995176A
Cited
US3030743A
Cited
US2983637A
Cited
US3166388A
Cited
US3276852A
Cited
US3333372A
Cited
GB1240289A
Cited
US3561938A
Cited
US3607502A
Cited
US3562968A
Cited
US3577872A
Cited
US3729873A
Cited
FR2095185A2
Cited
US4018574A
Cited
US3860400A
Cited
US3900355A
Cited
FR2250049A2
Cited
GB1492789A
Cited
GB1445520A
Cited
GB1475986A
Cited
DE2657881A1
Cited
CA1023563A
Cited
FR2396625A1
Cited
US4289168A
Cited
US4256467A
Cited
US4314827A
Cited
US4253836A
Cited
US4282011A
Cited
US4867760A
Cited
US4867760B1
Cited
US4394340A
Cited
US4455343A
Cited
US4373933A
Cited
EP0095055A2
Cited
US4525177A
Cited
US4554765A
Cited
EP0142140A2
Cited
US4653236A
Cited
US4734104A
Cited
WO1986002306A1
Cited
US4609581A
Cited
US4681558A
Cited
US4744802A
Cited
US4736549A
Cited
EP0213353B1
Cited
US4652274A
Cited
US4652275A
Cited
US4770671A
Cited
US4799939A
Cited
US4881951A
Cited
US4906523A
Cited
EP0321959A2
Cited
US4894280A
Cited
US4960442A
Cited
EP0333909A1
Cited
EP0340982A2
Cited
EP0349466A2
Cited
US5011508A
Cited
US4903440A
Cited
US5109638A
Cited
GB2240736A
Cited
US5137542A
Cited
US5078753A
Cited
US5108462A
Cited
US5236472A
Cited
WO1993002837A1
Cited
EP0533482A1
Cited
US5316812A
Cited
WO1993012911A1
Cited
US5341609A
Cited
US5203884A
Cited
WO1993024279A1
Cited
US5420015A
Cited
WO1995000294A1
Cited
WO1995011111A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-12 | 2000-05-13 | 2000-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-12 | 2004-05-13 | 2004-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-12 | 2008-05-13 | 2008-11-12 | $7700.00 | Window Closed / Lapsed |