US 11,738,532 B2
Stack of flexible bags, method and machine for producing said stack
Frédéric Staerck, Erstein (FR)
Assigned to Holweg Group, Molsheim (FR)
Appl. No. 16/763,598
Filed by HOLWEG GROUP, Molsheim (FR)
PCT Filed Nov. 12, 2018, PCT No. PCT/EP2018/080932
§ 371(c)(1), (2) Date May 13, 2020,
PCT Pub. No. WO2019/096738, PCT Pub. Date May 23, 2019.
Claims priority of application No. 1771221 (FR), filed on Nov. 16, 2017.
Prior Publication US 2020/0361171 A1, Nov. 19, 2020
Int. Cl. B31B 70/98 (2017.01); B31B 70/62 (2017.01); B65D 33/00 (2006.01); B65D 33/16 (2006.01); B31B 150/10 (2017.01); B31B 150/00 (2017.01); B31B 170/10 (2017.01); B31B 160/10 (2017.01)
CPC B31B 70/988 (2017.08) [B31B 70/62 (2017.08); B65D 33/001 (2013.01); B65D 33/1691 (2013.01); B31B 2150/003 (2017.08); B31B 2150/10 (2017.08); B31B 2160/102 (2017.08); B31B 2170/10 (2017.08)] 6 Claims
OG exemplary drawing
 
6. A machine for manufacturing flexible bags including a tube-forming device for forming a tube from a strip of flexible material, a separation device for separating a portion of the tube at a front of the tube while forming a first flap to a rear of the portion of the tube, the first flap prolonging a first wall of the portion of the tube beyond an end of a second wall adjacent to the first wall, a bag-bottom forming device for forming a bag with each portion of the tube by closing a front of the portion of the tube, and a stacking device for forming a stack of bags, the first wall of a first bag of the stack of bags being against a second wall of an adjacent second bag, the machine comprising a first means of application for applying an anti-adhesive coating on to the first wall of the first bag, and a second means of application for applying a coat of adhesive-to the anti-adhesive coating before the formation of the stack, and the coat of adhesive is transferred on to the second wall of the adjacent second bag when the stack is formed.