Start-up circuitry for stitching assemblies and the like

Sheet-material associating – Associating or disassociating – Signature associating

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Details

318391, B42G 102, H02P 104

Patent

active

044821409

ABSTRACT:
A chain conveyor (40) continuously feeds workpieces from a plurality of feed stations (10, 12, 14) to a reciprocating work station (B). A power supply (D) includes an electric motor (100) for providing motive power to the apparatus, and an electric power control circuit (102) for controlling the amount of electric power supplied to the motor. The power control circuit includes a plurality of resistive elements (124a, 124b, 124c) connected in series between the motor and power supply lines (112a, 112b, 112c). When a jog switch (126) is held closed, electrical power is provided to a main control relay (120) closing normally open relay contacts (120a, 120b, 120c). This provides electric power to the motor though the resistive elements causing the motor to be rotated at a slower speed. When a run switch (130) is closed concurrently with the job switch, a time controlled switch (144) starts timing a preselected duration while the motor rotates at the slower speed . After the preselected duration, the time controlled switch actuates a timing control relay (142) closing normally open contacts (142a, 142b, 142c) disposed in parallel with the resistive elements. In this manner, the resistive elements are by-passed and full power is delivered to the motor after the preselected duration causing it to operate at its normal, faster speed.

REFERENCES:
patent: 2482371 (1949-09-01), Rosenmund
patent: 3173592 (1965-03-01), Herbst
patent: 3235153 (1966-02-01), Crim
patent: 3502255 (1970-03-01), Hermann et al.
patent: 3554531 (1971-01-01), Heigl
patent: 3594625 (1971-07-01), Richardson
patent: 3662190 (1972-05-01), Naber
patent: 3664564 (1972-05-01), Stanton et al.
patent: 3743907 (1973-07-01), Dosch et al.
patent: 3819996 (1974-06-01), Habisohn

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