US 12,492,751 B2
Drum sealing gasket for washing and drying machine
Ho-Jun Lee, Gwangju (KR)
Assigned to HEAD LINE CO., LTD., Gwangju (KR)
Filed by HEAD LINE CO., LTD., Gwangju (KR)
Filed on Sep. 15, 2023, as Appl. No. 18/467,902.
Claims priority of application No. 10-2023-0001349 (KR), filed on Jan. 4, 2023.
Prior Publication US 2024/0218932 A1, Jul. 4, 2024
Int. Cl. F16J 15/3284 (2016.01); D04H 1/4266 (2012.01); D04H 1/4291 (2012.01); D04H 1/4382 (2012.01); D04H 1/488 (2012.01); D06F 25/00 (2006.01); D06F 37/02 (2006.01); D06F 37/20 (2006.01)
CPC F16J 15/3284 (2013.01) [D04H 1/4266 (2013.01); D04H 1/4291 (2013.01); D04H 1/43835 (2020.05); D04H 1/488 (2013.01); D06F 25/00 (2013.01); D06F 37/02 (2013.01); D06F 37/20 (2013.01); D10B 2505/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A drum sealing gasket of a washing and drying machine, the drum sealing gasket comprising:
a band-shaped belt of a cut felt manufactured by mixing natural fiber that is a mixture of one or more among wool fiber, cotton fiber, hemp fiber, and silk fiber and synthetic fiber that is a mixture of one or more among polyolefin, polyester, polyamide, polyacrylic, rayon, and nylon;
wherein the belt includes a first peripheral edge and a second peripheral edge extending along a longitudinal direction of the belt, the first peripheral edge being folded inwardly to a first width that does not reach a central line extending in a widthwise direction of the belt, and the second peripheral edge being folded inwardly to a second width that exceeds a central widthwise line of the belt;
wherein the first and second peripheral edges are integrally sewn to the belt using a sewing thread coated with a polydimethylsiloxane adhesive, the sewing thread being manufactured by immersing a fiber thread in liquid polydimethylsiloxane to impregnate the fiber thread, withdrawing the impregnated fiber thread from the liquid polydimethylsiloxane, and subsequently drying the thread to form a dried polydimethylsiloxane adhesive coating thereon;
a finishing space provided in a transverse-direction central portion of the belt to extend in a longitudinal direction with a width of 2 mm to 15 mm such that a finishing portion provided on an end of a drum is tightly received therein;
an extension portion formed by the second peripheral edge extending over at least a portion of the first peripheral edge;
a flexible band attached to a surface of the extension portion such that a distal end of the extension portion remains partially exposed, the flexible band being sewn to the extension portion using the sewing thread coated with a polydimethylsiloxane; and
a binding portion formed by abutting both longitudinal ends of the belt without a height difference and sewing the abutted ends together using the sewing thread coated with the polydimethylsiloxane adhesive.