A - Human Necessities – 43 – D
Patent
A - Human Necessities
43
D
12/14
A43D 21/00 (2006.01) A43D 25/07 (2006.01)
Patent
CA 1054317
ABSTRACT OF THE DISCLOSURE An upper is fitted onto a last using a casing containing a first, dome-shaped diaphragm defining a first chamber with a fixed last support; a second diaphragm defining a second chamber above the first chamber; a piston/cylinder arrangement for moving the casing and first and second diaphragms between an open position and a closed position in which the casing engages the support to define the first chamber around the support and lasted upper. By changing the fluid pressure in the first and second chambers, the upper can be drawn over the last in a controlled manner, while avoiding the formation of pleats in the upper. Using a pneumatic control device, first a low vacuum is drawn on the second chamber as the casing is moved to the closed position, and, before the casing reaches the closed position, the second chamber is subjected to a low super-atmospheric pressure. Thus, the first diaphragm is stretched over the last and upper. The casing is moved to the closed position, a high vacuum is drawn on the first chamber and the second chamber is subjected to a high super-atmospheric pressure, so that the upper is stretched around the last in pleat-free condition.
270200
Joosten Hendrik C. J.
Wilms Gerard J. M.
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