S.i.p.a. Societa' Industrializzazione Progettazione E Automazione S.p.a.

Other

S.i.p.a. Societa' Industrializzazione Progettazione Automazione S.p.a.

S.i.p.a. Societa' Industrializzazione Progettazione S.p.a.

David Gaiotti

Matteo Zoppas

Dino Enrico Zanette

Laurent Sigler

Giada Peruzzo

Luigino Bischer

Benedetta Zancan

Luca Della Pria

A container () made of thermoplastic material, defining an axis (X) and having a petaloid type bottom (), the bottom () comprising: -a central area (); -a plurality of first convex surfaces () towards the outside of the container, which extend from the central area (); -a plurality of feet (), arranged alternately with the first convex surfaces (), and projecting outwards with respect to the first convex surfaces (); -an annular rib (), which is coaxial to the axis (X); wherein the first convex surfaces () belong to the same spherical surface having the center (C) arranged on the axis (X).

Thermoplastic material container

The invention relates to a new PET preform design that enables a more precise distribution of material in the bottle bottom and avoids the waste of material around the injection point. The thickness BWTof the wall at the center of the gate or tip () (injection point) is reduced to a minimum in order to avoid the waste of material around the injection point when the preform is blown. This is particular important for carbonated soft drink application since the reduced amount of amorphous material at the center of the gate () helps to reduce the risk of stress cracking on the bottle base. Furthermore a step () having thickness WTin the body wall thickness, in the region of the periphery of the base with WT&#x3e;WT, allows enough material to be available for the proper blowing of the bottle bottom making the bottle more stable.

Preform for plastic container with thin bottom

The part under the neck ring () of a preform for blowing a PET bottle of predetermined capacity not larger than 75 cl and with a max. material weight of 15 g, is inclined by an angle &#x3b1; less accentuated than normal, max. 17&#xb0;, which allows to make a preform with a thickness tof the wall thinner than 1.9 mm and a thinner inner diameter of the preform body in order to allow a lower stretch ratio starting from a larger preform to obtain the final bottle of predetermined capacity.

Preform for container made of plastic material

A bottle made of PET which can be filled with a hot, warm or cold liquid has a neck, a body and a closed bottom. The body has a peripheral groove for pressure relief capable of collapsing in a controlled manner under the bias of an externally applied vertical axial load. The structure of the groove is such that after collapsing the bottle will not be able to resume its original shape unless it is subjected to the application of another external force of sufficient strength in reverse direction with respect to the force which was applied to obtain the collapsed shape.

Container with pressure variation compensation

A blow mold for making PET containers comprising an inner surface corresponding to the outer outline of the container, on which there are one or more cavities or projections configured to make corresponding respective projections or cavities of the outer surface of the container, wherein the mold comprises one or more venting grooves along the edge delimiting said cavities or projections. A plurality of venting holes are possibly arranged along such grooves, as well as it is also possible for some venting holes to be arranged outside thereof. The width and depth of these are selected according to the wall thickness of the container to be blown to prevent that the deformation of the container during the blowing obstructs the venting grooves and leaves visible marks on the container.

Growing community of inventors

Susegana, Italy

David Gaiotti