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US 5,634,721 AGranted
High pressure bag
AssigneeNampak Products Limited
InventorRobin I. Moore
Life of this patent
Estimating the term…
Abstract
A high pressure bag for pre-stressing a support pack in an underground mine has a fluid impervious liner and three tubular envelopes. The liner is located in the first envelope with end portions of the first envelope and edge strips of the liner folded over underneath the first envelope. The first envelope with the liner therein are in the second envelope, with end portions of the second envelope folded over on top of the second envelope. The second envelope is located within the third envelope which has opposed edges stitched closed. The liner has a nozzle which extends through openings in the envelopes.
Claims86
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- a first envelope which is of a flexible material and which has an opening for the nozzle;
- a second envelope which is also of a flexible material and which also has an opening for the nozzle;
- with the liner being located within the first envelope which is within the second envelope, the nozzle extending through the openings in the first and second envelopes;
- with the first envelope having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner, each flap comprising two layers of material;
- and
- with the second envelope also having a first flap comprising two layers of material, the first flap being folded over the first edge of the liner, overlying a side of the liner from which the nozzle extends and being sufficiently large to extend over the nozzle, both layers of material defining the first flap having an opening through which the nozzle extends and a second flap comprising two layers of material folded over the second edge of the liner.
5 more elements
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- a first envelope which is of a flexible material and which has an opening for the nozzle;
- a second envelope which is also of a flexible material and which also has an opening for the nozzle;
- with the liner being located within the first envelope which is within the second envelope, the nozzle extending through the openings in the first and second envelopes;
- with the first envelope having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner;
- with the second envelope also having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner;
- and
- a third envelope which also has an opening through which the nozzle extends, the second envelope, with the liner and the first envelope therein, being located within the third envelope, the third envelope having flaps which are folded over edges of the second envelope extending transversely to the first and second edges of the liner.
6 more elements
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- a first envelope which is of a flexible material and which has an opening for the nozzle;
- a second envelope which is also of a flexible material and which also has an opening for the nozzle;
- with the liner being located within the first envelope, the nozzle extending through the openings in the first and second envelopes;
- with the first envelope having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner;
- with the second envelope also having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner;
- and
- a third envelope which also has an opening through which the nozzle extends, the first envelope, with the liner therein, being located within the third envelope, which is located within the second envelope, the third envelope having flaps which are folded over edges of the first envelope extending transversely to the first and second edges of the liner.
6 more elements
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- a first envelope which has an opening for the nozzle and which is of a flexible woven material, having warp and weft threads;
- a second envelope which is also of a flexible material and which also has an opening for the nozzle;
- with the liner being located within the first envelope which is within the second envelope, with the weft threads extending parallel to the first edge of the liner and with the nozzle extending through the openings in the first and second envelopes;
- with the first envelope having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner;
- and
- with the second envelope also having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner.
5 more elements
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- a first envelope which is of a flexible material and which has an opening for the nozzle;
- a second envelope which also has an opening for the nozzle and which is of a flexible woven material, having warp and weft threads;.
- with the liner being located within the first envelope which is within the second envelope, with the weft threads of the second envelope extending parallel to the first edge of the liner and with the nozzle extending through the openings in the first and second envelopes;
- with the first envelope having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner;
- and
- with the second envelope also having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner.
5 more elements
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- a first envelope which is of a flexible material and which has an opening for the nozzle;
- a second envelope which is also of a flexible material and which also has an opening for the nozzle;
- with the liner being located within the first envelope which is within the second envelope, the nozzle extending through the openings in the first and second envelopes;
- with the first envelope having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner;
- with the second envelope also having a flap folded over the first edge of the liner and a flap folded over the second edge of the liner;
- and
- a third envelope which also has an opening through which the nozzle extends, the third envelope being of a flexible woven material, having warp and weft threads, with the weft threads extending transversely to the first edge of the liner.
6 more elements
Dependencies are inferred from the claim text.