← Back to Patent Explorer
US4014648A Expired / Lapsed US ⏱️ 0.0 years remaining

In-line flock cutting process

Assignee: Microfibers Inc
•
Filing: 1974-11-08
•
Granted: 1977-03-29
•
Expires: 1994-11-08
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A continuous in-line flock cutting process is disclosed, for making flock from tow which contains a lubricant which is detrimental to the flock and must be removed. The tow is continuously fed, heat treated and immersed in an aqueous scouring liquid, and is continuously wet-processed. The excess scouring liquid is squeezed out, the tow is rinsed with water, rinse water is squeezed out, and a finish is applied to the tow and partially squeezed out in an in-line continuous process to remove a portion of the applied finish. Thus processed, the still-wet tow is continuously cut into wet flock, the wet flock is then dried and beaten to open up and separate the individual flock particles, and screened.

Inventors

  • 👤 David I. Walsh
  • 👤 James P. Casey
  • 👤 George E. Corneau
  • 👤 William F. Laird

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 00:57
CPC Classifications
D; D06; D06B; D06B3/00; D06B3/02; D01; D01G; D01G1/00; D01G1/06; D01G1/10; Y; Y10; Y10S; Y10S83/00; Y10S83/913

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 254 words
In a continuous in-line method for making flock from a tow selected from the group consisting of rayon, nylon, polyester and acrylic which comprises a plurality of filaments and which contains a lubricant which is detrimental to said flock, the steps which comprises: a. continuously feeding the tow and said lubricant as a running tow, b. continuously scouring said tow by contacting it with a liquid scouring agent for removal of said lubricant from said tow, c. continuously squeezing excess scouring liquid from said tow, d. continuously rinsing said tow with water, e. continuously applying a predetermined pressure to squeeze excess rinse water from said rinsed tow, f. continuously applying a liquid finish to said tow, g. continuously applying another predetermined pressure of from about 60 to 100 lbs./square inch to said tow to remove a portion of the applied finish, h. continuouslycutting the resulting tow into flock, i. continuously drying the resulting wet flock wherein the drying step is controlled to moisture regain values of: ______________________________________ % Regain ______________________________________ AC Flocking DC Flocking ______________________________________ for rayon 6 - 8 10 - 12 for nylon 2 - 2.4 3 - 5 for polyester 1 - 2 1 - 2 for acrylic 1 - 2 1 - 2 ______________________________________ to produce a moist, hot air by-product, and wherein said by-product is continuously diverted from said flock, j. continuously beating the resultant dried flock with the admission of air, wherein the temperature of said admitted air is below about 100° F, and k. packaging the flock.
Claim 2
Dependent Claim 254 words
In a continuous in-line method for making flock from a tow selected from the group consisting of rayon, nylon, polyester and acrylic which comprises a plurality of filaments and which contains a lubricant which is detrimental to said flock, the steps which comprises: a. continuously feeding the tow and said lubricant as a running tow, b. continuously scouring said tow by contacting it with a liquid scouring agent for removal of said lubricant from said tow, c. continuously squeezing excess scouring liquid from said tow, d. continuously rinsing said tow with water, e. continuously applying a predetermined pressure to squeeze excess rinse water from said rinsed tow, f. continuously applying a liquid finish to said tow, g. continuously applying another predetermined pressure of from about 60 to 100 lbs./square inch to said tow to remove a portion of the applied finish, h. continuouslycutting the resulting tow into flock, i. continuously drying the resulting wet flock wherein the drying step is controlled to moisture regain values of: ______________________________________ % Regain ______________________________________ AC Flocking DC Flocking ______________________________________ for rayon 6 - 8 10 - 12 for nylon 2 - 2.4 3 - 5 for polyester 1 - 2 1 - 2 for acrylic 1 - 2 1 - 2 ______________________________________ to produce a moist, hot air by-product, and wherein said by-product is continuously diverted from said flock, j. continuously beating the resultant dried flock with the admission of air, wherein the temperature of said admitted air is below about 100° F, and k. packaging the flock.
Claim 3
Dependent Claim 14 words
The method defined in claim 1, wherein said flockis precision cut in step (h).
Claim 4
Dependent Claim 27 words
The methoddefined in claim 1, wherein excessively long particles of the dried cut flock are screened and random cut and are mixed with the cut flock product.
Claim 5
Dependent Claim 77 words
The method defined in claim 1, wherein said flock is selected from the group consisting of rayon, nylon, polyester and acrylic and is beaten and collected and after collection has the following moisture regain values: ______________________________________ % Regain ______________________________________ AC Flocking DC Flocking ______________________________________ for rayon 5 - 8 9 - 12 for nylon 1 - 3 2 - 5 for polyester 1/2 - 2 1/2 - 2 for acrylic 1/2 - 2 1/2 - 2 ______________________________________
Claim 6
Dependent Claim 27 words
The process defined in claim 1,wherein said tow is crimped, and further including the step of continuously decrimping said tow by tension in contact with a liquid.
Claim 7
Dependent Claim 24 words
The process defined in claim 1, wherein said tow is uncrimped, and further including the step of heat treating said uncrimped tow while running.
Claim 8
Dependent Claim 21 words
The process defined in claim 1, wherein said tow is dyed after said scouring step (b) and said squeezing step (c).
Claim 9
Dependent Claim 21 words
The process defined in claim 1, wherein said tow is bleached after said scouring step (b) and said squeezing step (c).

References Cited (Backward Citations)

US2908944A Cited
GB1008637A Cited
GB1008638A Cited
US3498816A Cited
US3791788A Cited
US3798048A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-03-28 1980-09-27 1981-03-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-03-28 1984-09-27 1985-03-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-03-28 1988-09-27 1989-03-29 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag