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US 4,225,374 AGranted
Decorative flooring
AssigneeArmstrong Cork Company
InventorJohn C. Kaufmann
Life of this patent
Estimating the term…
Abstract
A method for making a dimensionally stable decorative floor covering product. A sheet is first formed, and this is then provided with a decorative design. A clear wear layer is applied thereon, mechanically embossed-in-register, and then the sheet is cut into a plurality of individual tile units.
Claims1
A method of making a floor covering product comprising the steps of:
- (a) calendering into a base layer sheet a heated mass of particles of thermoplastic material;
- (b) depositing said sheet of thermoplastic material upon a heated nondistensible controlled release carrier that exhibits hot adherence and cold release;
- (c) conveying said sheet of thermoplastic material and the nondistensible controlled release carrier past heaters to achieve the correct temperatures for design application and adherence of the sheet to the carrier;
- (d) laminating at the design application station a preprinted transfer paper containing a design and registration band printed thereon to the heated surface of the sheet material with pressure and simultaneously adhering said sheet to the nondistensible controlled release carrier to prevent subsequent distortion;
- (e) cooling said transfer paper and then removing said transfer paper from the sheet material leaving a printed design on the sheet material and the sheet material still adhered to the nondistensible controlled release carrier, said transfer paper being stripped from and pulled in a direction backward from the path of travel of the sheet material whereby the stripping results in clean removal of the transfer paper from the sheet material;
- (f) applying a clear film wear layer to the surface of the sheet material with even adherence to the clear film wear layer to the sheet material simultaneous with the cross machine direction alignment of the printed sheet material adhered to the nondistensible controlled release carrier to the embossing roll;
- (g) subsequently embossing-in-register the composite sheet material without distortion thereof, said sheet material consisting of a base layer, printed design and clear wear layer;
- (h) cooling said composite sheet material;
- (i) stripping said composite sheet from the undistensible controlled release carrier by said cooling and change in direction of the carrier;
- (j) cutting said composite sheet in register with said design thereon into a number of individual tile units;
- (k) annealing said tile units to stress relieve said tile units;
- and
- (l) final sizing said tile units.
10 more elements
Dependencies are inferred from the claim text.