Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Reexamination Certificate
1998-08-26
2001-01-16
Silbaugh, Jan H. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
C264S235000, C264S346000, C264S481000, C264S485000, C264S492000, C264S493000, C264S519000, C425S174400, C425S446000, C425S403000, C425S393000, C002S239000, C002S409000
Reexamination Certificate
active
06174486
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention pertains to a method of heat-setting a garment by boarding the garment and subjecting it to preselected thermal conditions that are different for different parts of the garment.
DISCUSSION OF BACKGROUND ART
Methods have been proposed to modify stockings so that the pressure felt by different parts of a leg of a wearer are different. Japanese Kokai Patent No.'s Hei 3(1991)-287801, No. Hei 3(1991)-279403 and No. Hei 4(1992)-18102 each discloses a method for making stockings in which the knitting is changed for different parts of the stocking so that mesh size, yarn denier, and/or length of yarn per course is different and correspond to different parts of a wearer's leg. As a result, the pressure experienced by the wearer is different for different parts of the leg. However, such methods require complex knitting procedures in order to vary the stitch density (mesh size), length of yarn fed per course, and yarn denier.
A variety of methods have also been proposed to board and heat-set garments, including stockings. British Patent Number 719,795 discloses an apparatus for heat-setting stockings which do not contain spandex by passing them through a tunnel-like oven on an endless conveyor. Baffle plates are disclosed to direct the hot air onto the welt (knitted non-raveling edge) of the stocking. However, this is an imprecise method in that the hot air merely enters at that point and is not prevented from affecting the rest of the stocking.
Japanese Kokai Patent No. Hei 4(1992)-108181 discloses a method of exposing different parts of a stocking to UV radiation in addition to uniformly heating the entire stocking in order to adjust the stretch in different parts of the stocking. However, this method can result in undesirable deterioration of the fibers in parts of the stocking that have been exposed to the radiation.
A versatile and simple method of making stockings so that the pressure on the wearer's leg is different in several parts of the leg is still needed, as is a practical apparatus for carrying out such method.
SUMMARY OF THE INVENTION
The method of the present invention for heat-setting a garment containing spandex comprises the steps of:
mounting the garment comprising a plurality of garment parts on a boarding form;
heating the mounted garment by subjecting the garment to a plurality of preselected elevated temperatures corresponding spatially to the garment parts; and
removing the garment so heat-set from the form.
The apparatus of the present invention for heat-setting garments comprises:
at least one chamber;
a plurality of heating zones within the chamber;
a plurality of heating means, each heating means being positioned in a heating zone; and
a boarding form for mounting the garment, the form being supported within the chamber so that the heating zones correspond spatially to the garment parts.
REFERENCES:
patent: 1907511 (1933-05-01), Davies
patent: 4025597 (1977-05-01), Sawamoto
patent: 4180065 (1979-12-01), Bowen
patent: 4526732 (1985-07-01), Kakii et al.
patent: 4645629 (1987-02-01), Stern
patent: 4783293 (1988-11-01), Wellerhaus et al.
patent: 5108277 (1992-04-01), Dixon
patent: 719795 (1954-12-01), None
patent: 287801 (1991-12-01), None
patent: 279403 (1991-12-01), None
patent: 18102 (1992-01-01), None
Patent Abstracts of Japan, vol. 16, No. 351 (C-0968), Jul. 29, 1992 & JP,A,04 108101 (Toyobo Co. Ltd.), Apr. 9, 1992.
Patent Abstracts of Japan, vol. 16, No. 98 (C-0918), Mar. 11, 1992 & JP,A,03 279403 (Gunze Ltd.), Dec. 10, 1991.
Jin-Ya Tateo
Matsuda Hirofumi
Dupont Toray Co. Ltd.
Frank George A.
Poe Michael I.
Silbaugh Jan H.
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