Sewing machine which performs a stitching operation using multip

Details Sewing machine which performs a stitching operation using multip Sewing machine which performs a stitching operation using multip

1997-06-16

1998-11-10

Nerbun, Peter

Sewing

Elements

Needles

112294, 112302, 112DIG3, D05B 8700, D05B 5300

Patent

active

058328505

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to a sewing machine which performs a stitching operation with selectively using multiple kinds of threads supplied from respective thread supply sources.


BACKGROUND ART

Technical matters of a sewing machine of this type are described in, for example, Japanese Patent Publication (Kokai) No. HEI6-254277. The contents of the publication are partly quoted in "Column of the Prior Art" below. FIGS. Nos. 1, 2, 3, 4(A), 4(B), 9, and 10 of the publication are transcribed to the drawings of the present application. In order to distinguish the quoted figures from FIGS. 1 to 45 showing embodiments of the invention, the figure numbers of the quoted figures are indicated in the instant application as 46, 47, 48, 49A, 49B, 50, and 51, respectively. In the column of the prior art, therefore, FIGS. Nos. 1, 2, 3, 4(A), 4(B), 9, and 10 correspond to FIGS. 46, 47, 48, 49A, 49B, 50, and 51, respectively, of the instant application


COLUMN OF THE PRIOR ART

In FIGS. 1 and 2 showing the entire configuration of one head of a multihead multicolor sewing machine, 1 designates a frame or so-called bridge which is used in the multihead multicolor machine and elongates horizontally, 2 designates one machine mounted on the bridge 1, 3 designates a head of the machine, and 4 designates a head frame which is attached to the frame 1. The reference numerals 5, 6, 7, and 8 indicate the existence of a needle bar, a stitching needle which is provided at the lower end of the needle bar, a presser foot, and a take-up device, respectively. These components have well-known configuration, and are vertically reciprocated by a lifting mechanism which is not shown, as well known in the art. Next, the configuration for supplying color threads will be described. The reference numeral 9 designates thread supplies. In order to supply threads which are different from each other in color and size, the machine is provided with a plurality of thread supplies 9. The reference numeral 10 designates a selection device for selectively feeding out one of the threads supplied from the thread supplies 9. The reference numeral 11 designates retraction devices by which, when the stitching thread is to be changed to another one, the currently used thread is retracted to the selection device 10 so as to be returned to a preparatory state, and 12 designates a tension device for applying a fixed tension to the stitching thread. The reference numeral 14 designates a thread passing device for conducting thread passing from the selection device 10 to the take-up device 8, and 15 designates a thread passing device for conducting thread passing from the take-up device 8 to the needle 6. The reference numeral 16 generally indicates the existence of a well known bed of the machine, and, in the figure, designates the upper face of the bed. As well known, the bed is provided with a throat plate, and a well known shuttle is disposed under the throat plate. A well known cutting device for cutting the needle thread and the bobbin thread is disposed between the throat plate and the shuttle
Next, FIGS. 3 to 8 showing the selection device 10 will be described. The selection device 10 consists of a body 22 and an operating unit 23 surrounding it. In FIG. 3, 24 designates a casing of the body. The casing consists of a body member 25 which is substantially cylindrical and incorporates a configuration for selecting a thread, and two members constituting a thread guide passage, i.e., a first guide member 26 which has a conical shape, and a second guide member 27 which has a cap-like shape. The reference numeral 26a designates a threaded connecting portion, 25a and 27a designate flanges for connecting the second guide member 27 with the body member 25, and 28 designates a gasket for preventing air leakage from occurring. The outer side face of the first guide member 26 and the inner side face of the second guide member 27 are formed as sliding faces so that a thread can smoothly slide over the faces. The reference numeral 33 designates threa

REFERENCES:
patent: 3713605 (1973-01-01), Vahle et al.
patent: 4023512 (1977-05-01), Miyamoto
patent: 4198915 (1980-04-01), Peterson et al.
patent: 5165352 (1992-11-01), Ingram
patent: 5269244 (1993-12-01), Cataletto
patent: 5603462 (1997-02-01), Conrad et al.

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