Sarong Societa' Per Azioni

Sarong

Sarong Societa' Per Zioni

Primo Finetti

Andrea Bartoli

Antonio Freddi

Strips containers are formed using two continuous webs in thermoformable and heat-sealable material facing each other. The webs are indexed along a feed line through different operating stations that transform the webs into a continuous strip of containers, each one of which is provided with a mouth. The containers are arranged according to two parallel rows that are opposed to a longitudinal median zone. The mouths of the containers of the upper row are arranged on the upper longitudinal edge of the strip and face upwards, whilst the mouths of the containers of the lower row are arranged on the lower longitudinal edge and face downwards. The method enables productivity to be increased and waste to be reduced.

Method for forming strips of containers

A forming apparatus for forming at least one continuous strip of containers comprises a feed line for the indexing along a preset route according to an advancing direction and with a preset advancing step two continuous webs in film material that face each other. The webs pass through a heat-sealing station provided with a separator the end of which is arranged to be inserted between two open longitudinal flaps of the webs. During the phase of heat-sealing of the webs the separator is kept in position to exert downward pressure against said flaps by means of an axial fluid actuator. The invention ensures that at the forming station, that is contiguous with and subsequent to the heat-sealing station the flaps are sufficiently separated to receive the nozzles that blow in the forming fluid.

Apparatus for forming at least one continuous strip of containers

In a continuous strip of containers, the latter are distributed stepwise from one another according to a longitudinal axis of the strip, two adjacent containers being separated by a step. From one longitudinal edge zone traction pins protrude laterally that are intended in use to interact by contact with an advancing device for advancing the strip. For each traction pin a corresponding opposing projection is prearranged that protrudes from the opposite side of the longitudinal edge zone. The strip is designed to be conveyed along an advancing direction that is parallel to a longitudinal axis thereof. Each opposing projection is located slightly forward in relation to said advancing direction, compared with the relative traction pin, at an axial distance that is shorter than the step between the containers.

Continuous strip of containers having traction pins

The apparatus includes advancement clamps which move two mutually facing films along an advancement direction on which the following are arranged in sequence: two welding half-molds, which by mutually welding the two films in preset regions define cells which are open toward a longitudinal edge of the films; two half-molds for heating the welded films; a cell forming station. Air injection nozzles, inserted between the two flaps of the films on the side of the above mentioned longitudinal edge, and two forming half-molds, in which forming cavities are defined at the cells, operate in the forming station. Divaricators for divaricating the two flaps of the films are provided proximate to the forming station so as to facilitate the insertion of the air injection nozzles.

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Mirandola, Italy

Primo Finetti