US 11,905,101 B2
Method of making double-walled structure, and structure formed by the method
David Pierce, Norrköping (SE)
Assigned to Celwise AB, Norrköping (SE)
Appl. No. 17/261,138
Filed by Celwise AB, Norrköping (SE)
PCT Filed Jul. 19, 2019, PCT No. PCT/EP2019/069510
§ 371(c)(1), (2) Date Jan. 18, 2021,
PCT Pub. No. WO2020/016413, PCT Pub. Date Jan. 23, 2020.
Claims priority of application No. 1850917-4 (SE), filed on Jul. 19, 2018; and application No. 1950007-3 (SE), filed on Jan. 3, 2019.
Prior Publication US 2021/0316935 A1, Oct. 14, 2021
Int. Cl. B65D 81/38 (2006.01); D21J 3/10 (2006.01); B65D 1/26 (2006.01); B65D 3/06 (2006.01); D21J 7/00 (2006.01); B29C 39/12 (2006.01); B32B 37/00 (2006.01); B31F 1/00 (2006.01); B29C 51/00 (2006.01)
CPC B65D 81/3869 (2013.01) [B29C 39/12 (2013.01); B31F 1/007 (2013.01); B32B 37/0076 (2013.01); B65D 1/265 (2013.01); B65D 3/06 (2013.01); D21J 3/10 (2013.01); D21J 7/00 (2013.01); B29C 51/006 (2013.01); B31F 2201/0764 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of making a disposable double walled structure comprising:
an inner wall portion surrounding a product space presenting a cross section and extending along an axial direction, perpendicular to the cross section, between first and second axially spaced apart portions, and
an outer wall portion at least partially surrounding the inner wall portion, wherein an insulating space is formed between the inner and outer wall portions,
the method comprising:
forming the inner and outer wall portions in one piece from a pulp material, such that the inner and outer wall portions are connected at the first axial portion and at least partially overlap as seen in a direction perpendicular to the axial direction, and
bending at least one of the inner and outer wall portions in the direction perpendicular to the axial direction towards the other one of the inner and outer wall portions at the second axial portion, so as to form the insulating space.