Patent ID: 11905101
Assignee: CELWISE AB
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  D | IPC B  D

Claim 12:
13. A disposable double walled structure of pulp material, 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, wherein one of the axially spaced apart portions forms a closed end and the other one of the portions forms an open end, such that the space defines an axially open receptacle; 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; wherein a circumference of the product space is continuous in the sense that it does not present any joint, wherein the inner wall portion and the outer wall portion are formed in one piece of material such that the inner wall portion and the outer wall portion are connected by a continuous fold of said piece of material at the first axial portion and at least partially overlap as seen in a direction perpendicular to the axial direction, and wherein the outer wall is continuous in the sense that it does not present any circumferentially extending joint at a circumference of the open end of the receptacle.