Boot and shoe making – Lasting machines – Wiper folder
Patent
1985-06-24
1986-07-29
Schroeder, Werner H.
Boot and shoe making
Lasting machines
Wiper folder
12 12, 12 10, 12 145, A43D 2108, A43D 2100
Patent
active
046023984
DESCRIPTION:
BRIEF SUMMARY
The invention relates to machines for lasting the heel of a shoe with a wiper assembly.
In such machines the shoe, fitted over a last, is placed on a post which can be swung into the machine bringing the heel region of the last into a position below a shoe support. The post is then extended like a telescope, until the last comes up against the foot support, bringing the shoe on the last to its final position for further processing. Since the heel portion of the last will vary in its curvature, depending on the type of shoe and its size, the end position of the lasting edge of the heel will assume a variety of vertical positions relative to the foot support and wiper assembly. The shoe support accordingly has to be adjusted to properly locate the lasting edge relative to the fixed wiper assembly by adjusting the position of the foot support. This requires that the pressure be released and the post pivoted back to its initial position. Several adjustments often must be made before the correct last location is achieved and this time consuming process is undesirable.
It is accordingly an object of the present invention to provide a machine for lasting the heel of a shoe which will automatically locate the heel of any shoe at its desired location for lasting.
Other objects and advantages of the present invention will become apparent from the following portion of this specification and from the following drawings which illustrate, in accordance with the mandate of the patent statutes, a presently preferred embodiment incorporating the principles of the invention.
Referring to the drawings:
FIG. 1 is an elevational view, partly in section, illustrating the machine for lasting the heel of a shoe made in accordance with the teachings of the present invention;
FIG. 2 is a top view of the wiper assembly and the last when the last is at the dotted position illustrated in FIG. 1;
FIG. 3 is a view similar to FIG. 2 illustrating the last when it is at the dot-dash position illustrated in FIG. 2; and
FIG. 4 is a schematic illustration of an operating sequence for the disclosed invention.
The lasting machine includes a frame 1 on which is mounted a shaft 2 for pivotally supporting the post 3 for the last, 4. The last 4 is secured on a piston 22 which projects from the post. The last 4 is supported on the post 3 by means of a peg 5 which projects from the piston 22 and is inserted into a corresponding hole in the last 4. To give the last 4 a certain mobility about its longitudinal and transverse axes relative to the piston 22, the end surface 6 of the piston 22 is slightly cambered relative to the comb 7 of the last. Additional mobility is achieved by enlarging the hole in the last relative to the size of the peg.
The post 3 is swingable about its support shaft 2 from its retracted position the continuous line position, to its operative position by the cylinder 8, which extends between an upstanding bracket 10 of a control lever 13 and a wall 12 of the frame 1. One end of the control lever 13 is slidably displaceable within a wall 12 aperture and the other end is pivotally connected via a shaft 11 to the post 13 bracket. The lever 13 has an extension or cam 14 fixed to it which when the post 3 is swung inwards, to its intermediate position (the dotted position) will engage a cam contact 15.
Since a bracket portion 21 of the cam 14 underlies the control lever 13, the cam which is pivotally secured to the control lever 13 via a shaft 20 cannot rotate in the clockwise direction when the cam contact is engaged. The cam contact will accordingly be operated.
A last 4, fitted with an upper will be placed on the peg 5, when the post 3 is in the retracted position shown in FIG. 1. The post 3 can then be swung to the dotted line position in FIG. 1, where the last is just beginning to cross the inner edge of the heel band wiper plates 16.
This relative position of the last 4 and heel band wiper plates 16 is shown in a theoretical representation in FIG. 2 (FIG. 3 contains a complete drawing of the heel band wiper plates 16). It will be
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Meyers Steven N.
Schroeder Werner H.
Smith Spencer T.
USM Corporation
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