Tray forming machine

Details Tray forming machine Tray forming machine

1988-04-18

1990-06-26

Terrell, William

Manufacturing container or tube from paper; or other manufacturi

Container making

Rigid container

493126, 493133, 493167, B31B 346, B31B 306

Patent

active

049368150

ABSTRACT:
A tray forming machine comprising an infeed station for accepting a blank of corrugated plastic, and a transfer mechanism which automatically conveys the blank along a plane into a blank receiving station between a tray forming ram and a forming tool frame. The tray forming ram moves downward along a vertical path carrying the blank through the forming tool frame, during which the blank is folded into a generally upright tray configuration by a series of vertically displaced side and end forming bars and brackets. The tray forming ram and blank emerge from the forming tool frame and are received in a clamping and welding assembly which holds the blank in position while it is secured by sonic welds into the upright tray. The clamping assembly releases while the tray forming ram returns to its raised position, and the tray is stripped off the tray forming ram by the bottom of the forming brackets. The tray falls due to gravity onto a conveyor beneath the forming tool frame, and the trays are individually removed.

REFERENCES:
patent: 2398200 (1946-04-01), Van Voorhis
patent: 3008386 (1961-11-01), Mosse
patent: 3511140 (1970-05-01), Hoyrup
patent: 3593623 (1971-07-01), Oakley
patent: 3955482 (1976-05-01), Moen
patent: 4295839 (1981-10-01), Baker et al.
patent: 4522618 (1985-06-01), Stannard
patent: 4549876 (1985-10-01), Baker et al.
patent: 4581005 (1986-04-01), Moen
patent: 4588390 (1986-05-01), Heitele et al.
patent: 4636187 (1987-01-01), Oakley

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