Textiles: fluid treating apparatus – Machines – With gas – steam or mist treating
Patent
1995-04-13
1996-11-05
Coe, Philip R.
Textiles: fluid treating apparatus
Machines
With gas, steam or mist treating
34116, 34123, 34242, D06B 310, D06B 2318
Patent
active
055705952
DESCRIPTION:
BRIEF SUMMARY
This invention concerns improvements in continuous decatizing of fabrics in autoclave, and more particularly an apparatus of the type described in U.S. Pat. No. 5,430,955 (which is the U.S. equivalent to Italian Application No. MI91A001119 filed on Apr. 23, 1991) by the present Applicant, all intended for the purpose of maximum improvement of this important fabric finishing operation, while retaining the peculiar advantages of the continuous operation.
As it is already known, in the continuous decatizing operation, the worst problems are posed by the steam seals at the fabric entrance and exit from the autoclave. The patent application mentioned above was already aimed at solving the apparatus sealing problems, and this invention is solely intended to making improvements in the same area.
Another basic problem of decatizing in general is that fabric and/or felt or back cloth impregnation with air and with the oxygen contained therein tends to counteract the steam reducing action within the autoclave. Therefore, the main object of this invention is to do away as much as possible with said air negative effect, in a way particularly suitable for autoclave continuous decatizing.
The above and other objects, advantages and features of the improved apparatus according to this invention will become more apparent from the following detailed description of some preferred embodiments thereof, described herein for exemplary and non limiting purposes, referring to the attached drawings, wherein:
FIG. 1 shows a cross sectional view of an apparatus for continuous decatizing of fabrics in autoclave, improved according to this invention;
FIG. 2 shows an enlarged and more detailed view of the longitudinal steam seals, on opposite sides of the introductory cylinder;
FIG. 3 is a view, taken partially along the direction of arrow A in FIG. 2, relating to the autoclave side seals; and
FIG. 4 shows, in an enlarged scale, a further detail of FIG. 1, within the apparatus of this invention.
Referring now to the drawings, the improved apparatus according to this invention includes, as it is already known, a foraminous cylinder 2 rotatingly mounted within autoclave 1, and lined with a felt (not shown). Both a back cloth 3 preferably comprising a closed loop continuous felt, and a fabric 4 to be decatized shown in broken lines, both coming in from outside of autoclave 1, get wrapped around the cylinder. After having made an almost complete turn around the side surface of cylinder 2, the felt and the fabric exit from the autoclave again, as shown by the arrow, after passing around two guide rollers 9 and 10. Past second guide roller 10, after the felt and the fabric have left rotating cylinder 2, they are given reference numbers 3' and 4'. As described and claimed in the previous patent application mentioned above, a rotating cylinder 5 closes, as sealingly as possible, the passage between entering felt 3 and fabric 4 and felt 3' and fabric 4' being withdrawn, which are followed in their motion by said cylinder 5. At both sides of the latter there is then provided a pair of inflatable "air bag" gaskets, adapted to press felt and fabric against cylinder 5, in order to prevent any steam leakage.
According to this invention, inflatable gaskets 19 and 20 are exclusively housed within respective steel containers 17 and 18. As it was already provided in the patent application previously referred to, the friction developed by gaskets 19 and 20 against felt 3, 3' makes it advisable to interpose an antifriction material which, in the preferred embodiment of this invention, is provided by a stainless steel thin plate, 21 and 22 respectively, due to the high abrasive action of the felt used herein compared to a general "back cloth". 0f course, other rigid or semi-rigid materials may also be used, like for instance teflon, plastic and metal materials.
Further, a tubular substantially round cross sectional shape has been preferred for gaskets 19 and 20, but different shapes might be used, and non-inflatable gaskets as well, comprising for instance
REFERENCES:
patent: 1698818 (1929-01-01), Lorenz
patent: 2834193 (1958-05-01), Fahringer
patent: 3098260 (1963-07-01), Richeson
patent: 3158507 (1964-11-01), Alexander
patent: 3645116 (1972-02-01), Peter
patent: 4124942 (1978-11-01), Ohls et al.
patent: 4301665 (1981-11-01), Lopata
patent: 5301521 (1994-04-01), Bertoldo
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