RESERVOIR FOR FOOD PRODUCTS Russian patent published in 2008 - IPC B65D85/36 

FIELD: container.

SUBSTANCE: reservoir is formed from sheet or film thermoplastic with formation of bottom and lid, made with possibility of fixing lid on the bottom by means of lock. Lock includes fixing section, extended along contour of bottom and lid connection, and as minimum one local non-fixing section. Fixing lock section consists of corresponding fixing lock parts of bottom and lid. Fixing lock section of bottom is formed with volumetric ring protrusion, extended along bottom contour, with radial orientation of said protrusion to the side opposite to geometrical centre of bottom. Fixing lock section of lid is formed by volumetric ring groove extended along lower lid contour, repeating volumetric protrusion for possibility of lid fixation on bottom by placing protrusion in lid groove. Local non-fixing lock section is formed by local volumetric protrusion on lower lid perimeter, oriented upwards and to side opposite to geometrical centre of bottom, and local flat protrusion on lower lid perimeter, located in bottom plane and oriented to side opposite to geometrical bottom centre. Upper radial generatrix of local volumetric protrusion is made either as straight line, located at angle in bottom plane and joined with its lower end to local flat protrusion, or in form of protuberant arc, whose chord is located at angle to bottom plane and joined with its lower end to local flat protrusion. Radial size of protrusion is smaller than radial projection of upper radial generatrix of said local volumetric protrusion on bottom plane, by which necessary rigidity of system of protrusions is achieved. This rigidity allows to increase reliability of lock opening and simplify opening process due to essential reduction of deformation of protrusion and all system of protrusions in process of lock opening.

EFFECT: simplification of lock disconnection operation while preserving simple lock construction, simple lid fixation on bottom and high reliability of lid connection with bottom.

4 dwg