초록 ▼

The machine comprises a thermoforming box (116) which receives the container (126) and which is itself fitted into a cutting box (100), a heating die (148) mounted in vertically slideable manner above the said boxes and capable of squeezing a thermoforming film (44) or a closing film on the upper ed

The machine comprises a thermoforming box (116) which receives the container (126) and which is itself fitted into a cutting box (100), a heating die (148) mounted in vertically slideable manner above the said boxes and capable of squeezing a thermoforming film (44) or a closing film on the upper edge of the thermoforming box and of thermoforming the film (44) inside the container.

대표청구항 ▼

A machine for thermoforming an impervious film inside a cardboard container for packaging a foodstuff and for closing the container, which comprises: a slide (74) in the form of a frame of vertical axis, capable of being displaced horizontally, by driving means (92), between a retracted position and

A machine for thermoforming an impervious film inside a cardboard container for packaging a foodstuff and for closing the container, which comprises: a slide (74) in the form of a frame of vertical axis, capable of being displaced horizontally, by driving means (92), between a retracted position and a position inserted in the machine, a lower plate (52) carrying a support frame (72) which has the same section as the slide and on which the latter is capable of bearing in sealed contact when it is in the position inserted in the machine; a fixed upper plate (54) connected to the lower plate by pillars (56); an intermediate plate (58) guided in vertical movement on the pillars, and normally pushed upwards by first spring means (64) and downwards by a first pneumatic driving means (70); a cutting box (100) fitted inside the slide and provided on its upper edge with a peripheral blade (106); a thermoforming box (116) housed inside the cutting box and held above the latter, by second spring means (120), such that its upper edge is substantially at the same height as the edge of the peripheral blade (106) of the said box, the thermoforming box receiving a carton (126) to be thermoformed or an already thermoformed container containing a food product, and which it is desired to close, the side walls of the cardboard blank or of the container coming level with the upper edge of the thermoforming box; a second pneumatic driving means (108) intended to push upwards the cutting box (100) and, by means of the second spring means (120), the thermoforming box (116); a supply roll (42) of impervious thermoforming film (44); a supply roll (46) of closing film (48), one or the other of the said films being held taut above the slide, and a heating die (148) which is in the form of a plate fixed on the lower face of the intermediate plate (58) and which has the same surface area as the outer surface of the slide, such that it comes to squeeze the film (44 or 48) against the upper edge of the slide, when the intermediate plate is pushed downwards by the first pneumatic driving means (70), a first orifice (138) for admission of air or gas being provided in the enclosure formed below the thermoforming film by the slide, the support frame and the lower plate, pressing the thermoforming film flat against the lower face of the die, and a second orifice (154) for the admission of air or gas being provided for blowing hot air in towards the thermoforming film, by way of a plurality of holes (156) pierced in the die, and a peripheral weld element (160) framing the die (148) and intended to weld the closing film against the peripheral lip (177) formed by the thermoforming film outside the container.