Textiles: knitting – Independent-needle machines – Straight
Reexamination Certificate
1999-03-03
2001-01-09
Worrell, Danny (Department: 3741)
Textiles: knitting
Independent-needle machines
Straight
C066S06000H
Reexamination Certificate
active
06170300
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a flat knitting machine with a needle bed support and a machine base.
Flat knitting machines have a bending-resistant and torsion-resistant needle bed support which as a rule is formed as a cast or welded structure and rests on two lateral posts. The posts are also formed as cast or welding structures and connected with one another to reinforce the machine design. The needle bed support and the machine base are separate parts which are produced separately and subsequently are screwed or welded with one another. Moreover, the needle bed support and the machine base are the parts which are relatively expensive to manufacture.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a flat knitting machine which has a simpler and less expensive construction.
In keeping with these objects and with others which will become apparent hereinafter, one feature of present invention resides, briefly stated in a flat knitting machine with a needle bed support and a machine base, in which the needle bed support and the machine base are formed as an assembly.
In the flat knitting machine designed in accordance with the present invention, the mounting steps for connecting the needle bed support with the machine base are no longer needed. Moreover, the currently used welding or cast constructions for the needle bed support and the machine base can be eliminated.
Preferably, the outer casing of the needle bed support in the machine base can be formed of a single plate bending part or of several plate bending parts connected with one another. The total machine structure, including the bottom, the rearwall, the needle bed support, and the lateral walls of the needle bed support can be produced from a single material, for example a steel sheet plate.
It is especially advantageous when at least one plate bending part is produced from a flat plate cutout which is already provided with all openings, passages, recesses, edge cuts required for the machine.
In order to obtain a required rigidity and torsion strength, the plate bending part or parts can be reinforced by corrugations and/or transverse webs extending transversely to the longitudinal direction of the machine, and provided at least locally.
The main reinforcing can be obtained for example in the region of the end sides of the machine by vertical supporting plates arranged over the whole machine cross-section. This supporting plates can be also reinforced by corrugations or edging.
In the region of the needle bed support, a knitted article passage opening can be provided. It can be flanked at both sides by longitudinal plates extending along the machine and forming hollow profiles together with the plate bending part of the machine. The hollow profile can be additionally reinforced by a transverse sheet metal. Therefore, the hollow profile form the best resistance against bending and torsion. The total stability of the needle bed support for this construction is comparable with the stability of a cast needle bed support.
The shape of the profile and the edge radii are selected so that with the minimal plate thickness such a rigidity is obtained which is required for takeing up the occurring loads without shape changes which can interfere with the machine operation.
For supporting at least a greater part of the structural groups which belong to the loop formation, two left or right structural group supports can be arranged on the machine and mounted on the plate bending part or parts. They support the structural groups for the loop formation, such as both needle beds, a needle bed offset device, as well as a product withdrawal device. The structural group supports can be formed as cast parts which are connected by screws or pins with at least one plate bending part.
The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
REFERENCES:
patent: 1800265 (1931-04-01), Rolston
patent: 4586352 (1986-05-01), Morard et al.
patent: 1 091 977 (1955-04-01), None
Kapitel Winfried
Schmid Franz
H. Stoll GmbH & Co.
Striker Michael J.
Worrell Danny
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