Patents Assigned to Printex
  • Isodiametrical microcapsules with regularized diameters and process for producing same
    Patent number: 4482606
    Abstract: A microencapsulation of varied substances such as aromatic agents, colorings, inks, chemical reactives, pharmaceutical and phytosanitary products, fireproof products, glues, finely dispersed in an aqueous phase, in order to obtain microcapsules that are simulaneously isodiametrical and with regularized diameters, which consists in placing face to place an aqueous solution of polymers and/or hydrosoluble copolymers including at least one of the chemical functions belonging to the group constituted by the radicles --COOH, --OH, --CONH.sub.2, --COHNR, --CONRR', --NH.sub.2, NHR and --NRR', constituting the material of the capsule containing shell, and a solution of substances to be coated in at least one hydrophobic organic solvent, density close to 1, then submitting the liquid medium thus constituted to a mechanical shearing action corresponding to a shearing coefficient included between 8,000 second.sup.-1 and 70,000 second.sup.-1, while the medium is maintained at a temperature between 15.degree. C. and 85.
    Type: Grant
    Filed: March 9, 1982
    Date of Patent: November 13, 1984
    Assignee: Printex
    Inventors: Hubert Bousquet, Jean Bernard Egraz, Georges Ravet
  • Device for stacking and retaining in a stack flat goods, particularly plastic bags
    Patent number: 4095392
    Abstract: There is described a device which comprises fixed means to feed forks one by one to the stacking location along a path at right angle to the transfer means movement direction between the parallel members and adjacent that edge provided with said perforations of those bags retained by said members, said forks of U-shape being free relative to one another, with legs directed at right angle to the transfer means movement direction and the leg free ends being directed towards the means allowing to release the bags from the transfer means in such a way that the fork legs enter the bag perforations, and means for moving the fork brought to the stacking location and on which will be stacked the bags to form a stack, along a direction in parallel relationship with the legs thereof to let said fork lie in two positions, the one position in which the fork is stationary to allow stacking the bags during said stacking operation and the second position in which the forks is free and can leave by gravity the device with th
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: June 20, 1978
    Assignee: Printex
    Inventor: Edouard Louis van de Gent