Package making – Methods – Applying a partial cover
Patent
1981-02-19
1986-12-16
Sipos, John
Package making
Methods
Applying a partial cover
53441, 53556, 53587, B65B 1104
Patent
active
046286675
ABSTRACT:
A wrapping machine for wrapping a load in a unitary package. The load is supported on a rotatable support which can be rotated typically at speeds between 2 and 10 rpm. With the utilization of a variable speed DC motor drive in conjunction with an electronic control circuit, the speed of the support can be infinitely varied. As the support is rotated, a stretchable wrapping material is withdrawn from a rolled up sheet of such material and wrapped around the load due to the rotation of the support. A control mechanism controls the operation of the DC driving motor for causing the support to be rotated a plurality of turns for wrapping the load with the stretchable material being withdrawn from a dispensing mechanism. The control mechanism rotates the support at a first speed during a first portion of the rotatable movement of the support and then at a second slower speed during a subsequent portion of the rotatable movement of the support. The rotation of the support at the second slower speed only occurs during a portion of the last revolution of the support. By the use of such a second slower speed of rotation for the support, it is possible to gradually stop the rotation of the support thereby insuring that the support stops at the proper location in such a manner so as to avoid damage to either the load or the stretchable material being used for wrapping the load.
REFERENCES:
patent: 2864209 (1958-12-01), Balsiger
patent: 3589102 (1971-06-01), Zelnick
patent: 3626654 (1971-12-01), Hoffler
patent: 4077179 (1978-03-01), Lancaster
patent: 4248031 (1981-02-01), Del Pozo
patent: 4283903 (1981-08-01), Mayhall
Humphrey John R.
Reed John G.
International Packaging Machines, Inc.
Sipos John
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