METHOD FOR MANUFACTURE OF SHEET ARTICLES, DEVICE FOR ITS REALIZATION AND SHEET ARTICLE Russian patent published in 1998 - IPC

FIELD: methods and devices for manufacture of sheet articles. SUBSTANCE: each sheet article has sheet folded in bellow and at least one stiffening member connected to external part of folded sheet. The device for manufacture of sheet articles has means for supply of items in the form of combination of folded sheet and at least one stiffening member, their joining together and holding of sheet in folded position for at least during the period required for passage of section of approach to this joint. The method includes moving of folded sheet and stiffening member along the preset way so that their respective edges mutually displace relative to each other in direction of this motion, and sheet is held folded. In this case, during motion, the sheet and stiffening member, first, are located distant from each other and then they are joined together. The invention is also offers a sheet article which has separate envelope or hose located round folded sheet to hold it folded and/or sheet has additive of nonrigid substance in the form of impregnating agent hardened to impart rigidity to part of sheet. EFFECT: higher efficiency. 21 cl, 30 dwg