Metal working – Venetian blind assembling
Patent
1985-08-05
1987-05-19
Goldberg, Howard N.
Metal working
Venetian blind assembling
B23P 1004
Patent
active
046655999
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a machine for the production of Venetian blinds, said machine having a supply device for intermittently feeding a metal strip in the longitudinal direction of said strip from a supply reel through a number of ladder-tapes, and having a punching station with means for punching lift cord holes in the free end portion of the metal strip before this end portion is inserted in the ladder-tapes, and having a separating station for separating from the free end portion of the metal strip the individual Venetian blind slats inserted in the ladder-tapes.
A machine of this type is disclosed in Swedish patent specification No. 323,787 and has proved to be a highly efficient machine for the production of Venetian blinds. There is, however, a demand for still higher production rates, thereby to achieve an even higher output of the production of Venetian blinds. It has been found that the machine disclosed in above-mentioned patent, and other similar prior art machines, for mechanical reasons could not be redesigned for substantially higher production rates than those presently obtained. In view hereof, Venetian blind producers have need of an improved machine with which higher production rates can be achieved.
It therefore is an object of the present invention to provide a machine by which the production rate can be increased far beyond that of prior art Venetian blind production machines. Another object of the invention is to provide a Venetian blind production machine in which Venetian blinds of different lengths can be produced in one and the same production run. Further objects of the invention will appear from the following description.
Briefly stated, in one of its broad aspects, the invention provides a machine for the production of Venetian blinds, comprising means for intermittently advancing a strip of Venetian blind material lengthwise of the strip, and a lift cord hole punching station and a slat separating station arranged in succession along a path of advance of the strip such that the strip is advanced into the punching station and then into the separating station. The punching station has means operable upon an advance of the strip for punching lift cord holes in successive lengthwise portions of the strip, the successive portions corresponding to a plurality of Venetian blind slats. The separating station has means operable upon a further advance of the strip for simultaneously separating the successive punched portions of the strip from one another to yield a plurality of Venetian blind slats.
As will be described in detail later, a Venetian blind production machine according to the invention may comprise a punching station with at least two spaced punching tools operable upon an advance of a strip of Venetian blind material for punching lift cord holes in at least two successive portions of the free end of the strip. The punching station is followed by a combined mounting and separating station, said separating station comprising at least a corresponding number of separating punches for simultaneously separating the successive portions of the punched strip to yield separate Venetian blind slats for a plurality of concurrently produced Venetian blinds. The invention is based on the idea that the advance of the metal strip along the machine bed is to occur for continuous and maximum periods of time with a minimum of acceleration and retardation cycles during the Venetian blind production.
The invention thus is based on a new approach to the Venetian blind production technique, in that several Venetian blinds are manufactured in one and the same machine and in one and the same slat punching and slat separating run, the slats being separated simultaneously from one another and from the remaining portion of the metal strip by punching. This production technique thus makes it possible to increase the production rate of the machine to a considerable extent, and this increase is due not only to the fact that several Venetian blinds are manufactured at the same time, but also t
REFERENCES:
patent: 2893106 (1959-07-01), Rosenbaum
patent: 3531838 (1970-10-01), Pzeters
patent: 3766815 (1973-10-01), Edixhoven
patent: 4420862 (1983-12-01), Edixhoven
patent: 4516300 (1985-05-01), Gaillard et al.
Goldberg Howard N.
Nichols Steven
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