Backpack and method of producing the same

Abstract

A backpack may include a wind and heat insulating material, the wind and heat insulating material forming a body heated compartment. The backpack may further comprise a seal. The seal may be connected to the body heated compartment and configured to contact a user of the backpack such that the body heated compartment is at least partly sealed against the user.

What is claimed is: 
     
         1 . A backpack comprising;
 a body heated compartment comprising a wind and heat insulating material;   a seal connected to the body heated compartment, the seal configured to press against a user of the backpack thereby at least partly sealing the body heated compartment against the user, wherein the seal is formed by a soft material that is wrapped around an end of the wind and heat insulating material; and   at least two waist straps connected to shoulder straps, the waist straps configured to be re-connectable to each other.   
     
     
         2 . A backpack according to  claim 1 , wherein the seal is configured to be flexible, such that the seal will flex towards the user when the body heated compartment is stretched. 
     
     
         3 . A backpack according to  claim 1 , further comprising a heat transfer material that allows body heat to pass through, the heat transfer material arranged closer to the user than the wind and heat insulating material when the backpack is worn by the user. 
     
     
         4 . A backpack according to  claim 3 , wherein the wind and heat insulating material is connected with the heat transfer material thereby forming the body heated compartment. 
     
     
         5 . A backpack according to  claim 4 , wherein the wind and heat insulating material is connected with the heat transfer material by being sewn together. 
     
     
         6 . A backpack according to  claim 1 , wherein at least one shoulder strap of the backpack comprises the body heated compartment. 
     
     
         7 . A backpack according to  claim 1 , wherein the body heated compartment comprises an opening. 
     
     
         8 . A backpack according to  claim 7 , wherein the opening is re-closable. 
     
     
         9 . A backpack according to  claim 7 , wherein the opening is arranged at an end of a shoulder strap. 
     
     
         10 . A backpack according to  claim 7 , wherein the opening is arranged at a side of a shoulder strap. 
     
     
         11 . A backpack according to  claim 1 , wherein the wind and heat insulating material comprises a material selected from the group consisting of a biaxially-oriented polyethylene terephthalate, a metalized biaxially-oriented polyethylene terephthalate, an ultra-high-molecular-weight polyethylene, a stretched polytetrafluoroethylene, a neoprene, tarpaulin, a chlorosulfonated polyethylene synthetic rubber, a nylon, and a polyester. 
     
     
         12 . A method for producing a backpack comprising a body heated compartment, comprising:
 forming a body heated compartment by use of a wind and heat insulating material; and   connecting a seal to the body heated compartment, the seal connected and configured to press against a user of the backpack such that the body heated compartment is at least partially sealed against the user, wherein the seal is formed by a soft material that is wrapped around an end of the wind and heat insulating material; and   wherein the backpack comprises at least two waist straps, the waist straps connected to shoulder straps, the waist straps configured to be re-connectable to each other.   
     
     
         13 . A method for producing a backpack according to  claim 12 , wherein the body heated compartment is formed by connecting the wind and heat insulating material with a heat transfer material. 
     
     
         14 . A method for producing a backpack according to  claim 13 , wherein the heat transfer material and the wind and heat insulating material are connected to each other by being sewn together. 
     
     
         15 . The backpack according to  claim 1 , wherein the seal is an oblique end. 
     
     
         16 . The method according to  claim 12 , wherein the seal is an oblique end. 
     
     
         17 . The backpack according to  claim 1 , wherein the seal has an enlarged contact surface configured to improve the contact between the user and the body heated compartment. 
     
     
         18 . The method according to  claim 12 , wherein the seal has an enlarged contact surface configured to improve the contact between the user and the body heated compartment 
     
     
         19 . The backpack according to  claim 1 , wherein the backpack does not contain a heat source.