Rotatable cylindrical needle plate with distinct needle holes

Details Rotatable cylindrical needle plate with distinct needle holes Rotatable cylindrical needle plate with distinct needle holes

1991-10-23

1992-10-13

Schroeder, Werner H.

Sewing

Elements

Frames

11212115, 112311, D05B 7312

Patent

active

051545900

ABSTRACT:
A rotatably mounted needle plate (30) in the form of a cylindrical sleeve is provided for a sewing machine (1) with which seams can be produced as a result of a relative movement between the sewing machine (1) and a cloth holder (68). The needle plate (30) has at least one needle-plate attachment (37) and at least two needle holes (38, 38'), a longitudinal axis (39) of each needle hole (38, 38') being radial to an axis of rotation (40) of the needle plate (30). The needle-plate attachment (37) provides cloth resting surfaces (41) surrounding each needle hole (38, 38') which are at different distances from the axis of rotation (40). By rotating the needle plate (30) there is obtained an adjustment of the sewing level, as a result of which it is assured that the lower side of the cloth will dependably rest on the cloth resting surfaces (41) during the sewing even when the cloth has partially thick regions within the course of the seam. Since both round and slot-shaped needle holes (38, 38') are provided in the needle plate (30) and the cloth resting surfaces (41) of these needle holes (38, 38') are at equal distances from the axis of rotation (40), then different types of stitches (straight stitch or zig-zag stitch) can be present within the same seam.

REFERENCES:
patent: 3313259 (1967-09-01), Daniel et al.
patent: 3513795 (1970-05-01), Hagemeyer
patent: 4303028 (1981-12-01), Takenoya et al.
patent: 4493280 (1985-01-01), Bianchi
patent: 4520744 (1985-06-01), Portilla
patent: 4876975 (1989-10-01), Braun
patent: 4889062 (1989-12-01), Orii
patent: 4991526 (1991-02-01), Blanc

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