Textiles: knitting – Fabric manipulation – Transferring fabric
Patent
1996-04-26
1997-04-08
Calvert, John J.
Textiles: knitting
Fabric manipulation
Transferring fabric
66 58, D04B 956
Patent
active
056177445
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The invention relates to an improvement of the device described in Italian Patent No. 1,252,799 (Application 13.9.91 FI 91 A 227 in the name of Giovanna Bazzanti) for the automatic initial formation of a closed toe in a tubular knitted article--such as a sock, a stocking or the leg of tights--directly on the circular knitting machine with a needle cylinder on which the said article is formed. This device comprises a plurality of hooks capable of engaging the partial initial fabric of a pocket formed by the needles of a sector covering approximately a semicircumference, the said needles being capable of transferring the said initial hem to the needles of the other, opposite sector of needles, before the start of the circular knitting of the article.
2. Background Art
Before the above mentioned Italian patent application n. FI91A227, other attempts have been made to close the toe of the stocking directly on the circular knitting machine.
Italian patents n. 676.845 and 685.974 to Giuliano Ugolini disclose the closing of the toe, upon completion of the knitted tubular article, by means of a device which replaces the normal dial plate. It is therefore impossible to knit a double hem, which requires use of the dial hooks.
Italian patent n. 1.205.775 to Schiavello also discloses the closing of the toe upon completion of the tubular article. The transfer of the loops upon closing of the toe should be provided by mechanical members whose functionality is not convincing.
All these prior art devices, moreover, have the drawback of a relatively coarse end (unthread portion) protruding from the article at the toe region.
Italian patent application n. 9465 A/90, filed Aug. 10, 1990 in the name of Conti Florentia and Italian patent application n. FI 91 A227 filed Sep. 13, 1991 in the name of Bazzanti, disclose an apparatus which allow to begin the working of the article starting from a closed toe on the same machine on which the article is then completed. These machines have several functional complications which are eliminated by the present invention.
3. Disclosure of the Invention
According to the present invention, the said hooks are disposed at the ends of rods which are elastically flexible; these rods are moved longitudinally by cams of a ring of cams surrounding the needle cylinder. The rods are suitably guided as they slide; one of the guide means provided for the axial sliding of the said rods is a curved support which is hinged so that it can oscillate about an axis which is diametric with respect to the circumferential working area of the needles of the needle cylinder, radial sliding passages for the individual rods being formed radially in this support. Means are provided to move the said support between two substantially opposite positions to cause the overturning of the hooks and consequently the transfer of the said hem.
One of the means for guiding the said rods may also be a traversing element with a guide means which moves the rods into a working position which is substantially central with respect to the needle cylinder, and into a position displaced to one side in the inactive state of the hooks, to permit the passage and the tensioning--especially by pneumatic means--of the article being formed after the production of the toe. These guide means on the traversing element may also be made in such a way that they bring the rods together or at least closer to each other.
The means of guiding and moving the rods are disposed over an arc of the circumference of the needles, on one side of the axis of the support which is the side corresponding to the inactive states of the hooks during the formation of the leg.
The means of guiding the rods may comprise tubes or equivalent elements in which the rods are guided parallel to the axis of the cylinder; the said tubes or equivalent elements are disposed over an arc of the circumference of the section of the needle cylinder.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be more clearly understood from the description an
REFERENCES:
patent: 1308828 (1919-07-01), Williams
patent: 2089147 (1937-08-01), Lawson et al.
patent: 5551260 (1996-09-01), Frullini et al.
Calvert John J.
Golden Lady S.P.A.
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