Screw Cap for Large Containers
First Claim
1. A screw closure (100) of plastic for large containers, comprising a cylindrical outer shell (1) having a first female thread (2) of larger diameter and a head plate (3) which at least partially closes the outer shell (1) at an axial end, wherein the head plate (3) has an opening (4) which in turn accommodates a removal sleeve (20) having an approximately cylindrical inner shell (11) which projects into the interior of the outer shell and has a second female thread (12) of smaller diameter, wherein the head plate (3) and the removal sleeve (20) are integrally connected together, characterised in that the outer shell (1) with head plate (3) on the one hand and the removal sleeve (20) with female thread (2) on the other hand are produced separately from each other by injection moulding and are fixedly and tightly connected together by welding or gluing to form the complete screw closure (100).
1 Assignment
0 Petitions
Accused Products
Abstract
A plastic screw cap (100) for large containers, comprises a cylindrical outer jacket (1) having a first internal thread (2) of larger diameter and a head plate (3), which at least partially closes the outer jacket (1) at an axial end, wherein the head plate has an opening (4), which accommodates a removal sleeve (20) having an approximately cylindrical inner jacket having a second internal thread (12) of smaller diameter, which inner jacket protrudes into the interior of the outer jacket, wherein the head plate (3) and the removal sleeve (20) are integrally joined to each other. In order to provide caps of the same functionality that can be produced more simply, the outer jacket (1), according to the invention, together with the head plate (3) on the one hand and the removal sleeve (20) together with the internal thread (2) on the other hand are produced separately from each other by injection molding and are joined to each other fixedly and tightly by welding in order to form the complete screw cap (100).
1 Citation
16 Claims
- 1. A screw closure (100) of plastic for large containers, comprising a cylindrical outer shell (1) having a first female thread (2) of larger diameter and a head plate (3) which at least partially closes the outer shell (1) at an axial end, wherein the head plate (3) has an opening (4) which in turn accommodates a removal sleeve (20) having an approximately cylindrical inner shell (11) which projects into the interior of the outer shell and has a second female thread (12) of smaller diameter, wherein the head plate (3) and the removal sleeve (20) are integrally connected together, characterised in that the outer shell (1) with head plate (3) on the one hand and the removal sleeve (20) with female thread (2) on the other hand are produced separately from each other by injection moulding and are fixedly and tightly connected together by welding or gluing to form the complete screw closure (100).
-
12. A first part (10) of a closure (100) comprising two assembled, sealingly connected parts (10, 20), wherein the first part (10) has a cylindrical outer shell (1) having a first female thread of a first diameter and a head plate (3) closing the outer shell at an axial end, wherein the head plate (3) has an opening (4), characterised in that an annular region is of an axially set-back configuration around the opening.
-
13. A second part (20) of a closure (100) comprising two assembled, sealingly connected parts (10, 20), wherein the second part (20) in the form of a sleeve closed at one end by a bottom, a cylindrical shell with a female thread of a second diameter and a flange edge (16) surrounding an axial opening in the sleeve, wherein the bottom has a peripherally extending weakening line (18) near its outer periphery and on one side has a raised portion (15) facing towards the open side and near the weakening line, which axially projects with respect to the other regions near the weakening line (18), characterized in that at its underside the flange edge (16) has energy direction means (17) provided for welding the flange edge (16) to an oppositely disposed surface of a first closure part (10).
Specification