Gatefold apparatus and method

Manufacturing container or tube from paper; or other manufacturi – Control means energized in response to activator stimulated... – Responsive to work material – the product or means engaging...

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Details

493420, 493421, B65H 4514

Patent

active

050373641

ABSTRACT:
Apparatus and metyod for making a gatefold in a central portion of a sheet along a gatefold line. The apparatus includes a fold pan (30) for receiving a sheet with a first outer leaf folded, and for folding a second outer leaf of the sheet inwardly toward a central portion as the sheet passes between associated rolls (20, 22). A gatefold pan (32) receives the sheet from between the rolls (20, 22). The gatefold pan (32) includes a deflector (62). The deflector (62) is movable, under control of actuators (64, 68), from a retracted position to an extended position into a path of travel of the sheet from the fold pan (30) to the gatefold pan (32). In its extended position, the deflector (62) serves to deflect the first outer leaf of the sheet toward the central portion of the sheet. Sensors (82, 84) are provided in the respective fold pans (30, 32) and are connected to actuator control means. In addition to causing retraction of the deflector (62) after the gatefolding of a sheet, the control means also prompts retraction of the deflector (62) under two error conditions. The first error condition occurs when two successive sheets are sensed as leaving the fold pan (30) without a sheet leaving the gatefold pan (32). A second error condition involves the detection of a predetermined time delay between the sensing of a sheet leaving the fold pan (30) and the sensing of a sheet leaving the gatefold pan (32).

REFERENCES:
patent: 2997295 (1961-08-01), Beck
patent: 3901501 (1975-08-01), Kistner
patent: 3975009 (1967-08-01), Brown
patent: 4419088 (1983-12-01), Nemec

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