Patent ID: 9096015
Filing Date: 2015-08-04
Classification: B29C,B29L,E06B,Y10T

Abstract:
1. Method for forming an overlap by welding sheets, comprising the steps of: placing a main sheet and an additional sheet overlaid on one another, connected to one another by means of a contact area; the contact area selected from the group consisting of: a main sheet contact surface, an additional sheet contact surface, a contact sheet and a combination thereof; the contact area being located on a contact side of each of the main sheet and additional sheet, wherein an outer surface of each of the main sheet and additional sheet is a surface of the respective main sheet and additional sheet on a side of the respective main sheet and additional sheet opposite the contact side of the respective main sheet and additional sheet; heating the contact area to a melting temperature for melting same, applying pressure between the outer surfaces; and cooling; wherein the contact area is made of a thermoplastic material and the main sheet outer having a main sheet critical temperature; wherein the main sheet outer surface is heated to a temperature comprised within a temperature range that is higher than ambient temperature and less than or equal to the main sheet critical temperature; wherein the additional sheet outer surface is heated to a temperature that is higher than a heating temperature of the main sheet outer surface and suitable for melting the contact area in a heating time; and wherein the additional sheet outer surface is heated to a temperature that is higher than the main sheet critical temperature and suitable for melting the contact area in the heating time.