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US3765922A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of forming flocked articles

Assignee: Dow Chemical Co
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Filing: 1971-06-29
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Granted: 1973-10-16
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Expires: 1991-06-29
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Abstract

Abstract A flocked article and method for making the same comprising centrifugally extruding thermoplastic strands or filaments of any desired thickness and length, and then impinging the rapidly moving strands or filaments on a substrate base of any desired material or combination of materials immediately after said strands or filaments are freed from an extrusion die. Direct fusion bonding of the strands or filaments to the substrate may be achieved, or bonding of the strands or filaments may be obtained by applying an adhesive or hot melt layer to the substrate base prior to impinging them thereon, or by using a heat softened thermoplastic substrate. Unique flocking apparatus is obtained by using a centrifugal extruder in combination with other means of forming the substrate base. Also, a novel flocked article may be achieved by the penetration of one end of the strands or filaments into the matrix of the substrate base prior to their bonding or fusion therewith.

Inventors

  • 👤 D Chisholm

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 01:11
CPC Classifications
D; D04; D04H; D04H11/00; D04H3/00; D04H3/02; D04H3/03; D04H3/033; D04H3/08; D04H3/16; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23943

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 28 words
The method of claim 1 wherein said freeing of said strands or filaments from said centrifugal extruder is accomplished by cutting said strands or filaments with a knife.
Claim 2
Dependent Claim 27 words
The method of claim 1 wherein said freeing of said strands or filaments from said centrifugal extruder is accomplished by melt fracture of said strands or filaments.
Claim 3
Dependent Claim 28 words
The method of claim 1 wherein said impinging of said strands or filaments on said substrate base is followed by said strands or filaments being securely bonded thereto.

References Cited (Backward Citations)

US3215584A Cited
US3424832A Cited
US3649408A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-10-15 1977-04-16 1977-10-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-10-15 1981-04-16 1981-10-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-10-15 1985-04-16 1985-10-16 $7700.00 Window Closed / Lapsed

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