Importance

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Abstract

A device for producing plastic trays (1) in which two parallel opposed walls (6, 7) are slanted in respect to a plane perpendicular to the sealing plane thereof. The two molding or thermoforming tools (12, 13) in this device are respectively carried by two movable supports (14, 15) capable of moving the tools along an axis (Z--Z') parallel to slanted walls of the tools which correspond to the slanted walls (6, 7) of the tray (1) to be produced. This slanted axis (Z--Z') makes it possible to use simple molding tools, namely an external female tool (12) and an internal punch (14). The packaging plant comprises a tray-forming device (8) as above-described, followed by a welding station (17) for welding a sealing film (18) onto the salient peripheral rim (3) of each plastic tray (1). In this station (17), a movable support member (22) for the tray (1) is movable along an axis (W--W') having the same slant as the sidewalls (6, 7) of the tray. The welding station (17) is followed by a cut-off station (23) for separating the trays having been formed as a continuous strip. The cutting tool (24) in this station (23) moves along an axis (V--V') which also has the same slant as the sidewalls (6, 7) of the tray. The trays (1) can be placed upright on a display shelf (2), so that advertising features appearing on the sealing film (4) are readily visible to potential buyers.

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First Claim