Blast-hole liner

Claim 2

A flat-storable blast-hole liner which comprises: a. a flattened section of flexible, water-proof tubing having an open end to admit an explosive charge and a water-tight, transversely sealed closed end, and a flexible, flattened pouch member which has proximal and distal ends and which is sealed at its proximal end transversely across its width and there joined to the closed end of said tubing by a waterproof seal to permit said pouch member to assume a plane which is parallel to the plane defined by said flattened section of tubing, said pouch member having an opening therein spaced from said distal end to permit the insertion of weighting material into the pouch member distally of said opening, at least two plies separating the explosive from the weighting material when the tubing and pouch member are respectively charged with explosive and weighting material.

Claim 3

A flat-storable blast-hole liner comprising a. a section of flattened, flexible water-proof tubing, one end of said tubing being open to admit an explosive charge, and the other end of said tubing being closed by a water-proof seal extending transversely of said tubing, and b. a flattened, flexible pouch member having proximal and distal ends, the proximal end of which is sealed along its width by a transverse, water-proof seal and there sealed to the sealed end of said tubing to permit said flattened pouch member to facingly engage said flattened tubing during storage in roll form, said pouch member having an opening therein spaced from said distal end to permit the insertion of weighting material into said pouch member distally of said opening, at least two plies separating the explosive from the weighting material when the tubing and pouch member are respectively charged with explosive and weighting material.

Claim 4

A flat-storable blast-hole liner comprising a. a section of flattened, flexible water-proof tubing, one end of said tubing being open to admit an explosive charge, and the other end of said tubing being closed by a water-proof seal extending transversely of said tubing, and b. a flattened, flexible pouch member having proximal and distal ends, the proximal end of which is sealed along its width by a transverse, water-proof seal and there sealed to the sealed end of said tubing to permit said flattened pouch member to facingly engage said flattened tubing during storage in roll form, said pouch member having an opening therein spaced from said distal end to permit the insertion of weighting material into said pouch member distally of said opening, at least two plies separating the explosive from the weighting material when the tubing and pouch member are respectively charged with explosive and weighting material.

Claim 5

The blast-hole liner according to claim 2 which includes a second flattened, flexible, protective sheath member which sheaths said tubing for a portion of its length adjacent the sealed end thereof, said sheath member being joined by a transverse, water-proof seal, to the sealed end of said tubing; said pouch member being transversely sealed at its proximal end to the sealed end of said sheath member.

Claim 6

The blast-hole liner according to claim 2 wherein the distal end of said pouch member is narrower in width than the proximal end thereof.

Claim 7

A flat-storable blast-hole liner comprising a. a section of flattened, flexible, water-proof tubing, one end of said tubing being open to admit an explosive charge, and the other end of said tubing being closed by a water-proof heat seal extending transversely of said tubing, and b. a flattened, flexible pouch member having proximal and distal ends, said proximal end being heat sealed transversely along its width and there heat sealed to the sealed end of said tubing to permit said flattened pouch member to facingly engage said flattened tubing contiguous its sealed end during storage in roll form, said pouch member having an opening therein spaced from said distal end to permit the insertion of weighting material into said pouch member distally of said opening, at least two plies separating the explosive from the weighting material when the tubing and pouch member are respectively charged with explosive and weighting material.

Claim 8

A flat-storable blast-hole liner comprising a. a section of flattened, flexible, water-proof tubing, one end of said tubing being open to admit an explosive charge, and the other end of said tubing being closed by a water-proof heat seal extending transversely of said tubing, and b. a flattened, flexible pouch member having proximal and distal ends, said proximal end being heat sealed transversely along its width and there heat sealed to the sealed end of said tubing to permit said flattened pouch member to facingly engage said flattened tubing contiguous its sealed end during storage in roll form, said pouch member having an opening therein spaced from said distal end to permit the insertion of weighting material into said pouch member distally of said opening, at least two plies separating the explosive from the weighting material when the tubing and pouch member are respectively charged with explosive and weighting material.

Claim 9

A flat-storable blast-hole liner comprising a. a section of flattened, flexible, water-proof tubing, one end of which is open to admit an explosive charge, and the other end of which is closed by a water-proof heat-seal extending transversely of said tubing, b. a flattened, flexible, protective sheath member sheathing said tubing for a portion of its length adjacent the sealed end of said tubing, said sheath member being transversely heat-sealed to the sealed end of said tubIng; an c. a flattened, flexible pouch member having proximal and distal ends and which is heat-sealed at its proximal end and there transversely heat-sealed to said sealed end of said sheath member to permit said pouch member to facingly engage said flattened tubing contiguous the sealed end of said tubing during storage in roll form, said pouch member having an opening therein spaced from said distal end to permit the insertion of weighting material into said pouch member distally of said opening, at least two plies separating the explosive from the weighting material when tubing and pouch member are respectively charged with explosive and weighting material.

Claim 10

A flat-storable blast-hole liner comprising a. a section of flattened, flexible, water-proof tubing, one end of which is open to admit an explosive charge, and the other end of which is closed by a water-proof heat-seal extending transversely of said tubing, b. a flattened, flexible, protective sheath member sheathing said tubing for a portion of its length adjacent the sealed end of said tubing, said sheath member being transversely heat-sealed to the sealed end of said tubIng; an c. a flattened, flexible pouch member having proximal and distal ends and which is heat-sealed at its proximal end and there transversely heat-sealed to said sealed end of said sheath member to permit said pouch member to facingly engage said flattened tubing contiguous the sealed end of said tubing during storage in roll form, said pouch member having an opening therein spaced from said distal end to permit the insertion of weighting material into said pouch member distally of said opening, at least two plies separating the explosive from the weighting material when tubing and pouch member are respectively charged with explosive and weighting material.

Claim 11

The blast-hole liner according to claim 5 wherein the distal end of said pouch member is narrower in width than the proximal end thereof.

Claim 12

The blast-hole liner according to claim 6 wherein the distal end of said pouch member is narrower in width than the proximal end thereof.

Claim 13

Method of making a flat-storable blast-hole liner comprising a. providing a single length of flattened, flexible, tubular, heat-sealable material having upper and lower ends; b. doubling the lower end portion of said tubing back upon itself to form a transverse crease; c. sealing said doubled-back section above said crease to the adjacent descending portion of tubing by means of a transverse heat seal which provides a water-proof seal across the lower end of the descending tubing; d. tapering the open end of said doubled-back portion of tubing so that the width of the terminal end thereof is less than the width of the doubled-back section at said heat seal; e. heat-sealing said trimmed open end of said doubled-back section to form said section into a closed pouch; and f. transversely slitting one wall of said pouch along a portion of its width to provide an opening therein spaced from the terminal end of said pouch.

Claim 14

Method of making a flat-storable blast-hole liner comprising a. providing a single length of flattened, flexible, tubular, heat-sealable material having upper and lower ends; b. doubling the lower end portion of said tubing back upon itself to form a transverse crease; c. sealing said doubled-back section above said crease to the adjacent descending portion of tubing by means of a transverse heat seal which provides a water-proof seal across the lower end of the descending tubing; d. tapering the open end of said doubled-back portion of tubing so that the width of the terminal end thereof is less than the width of the doubled-back section at said heat seal; e. heat-sealing said trimmed open end of said doubled-back section to form said section into a closed pouch; and f. transversely slitting one wall of said pouch along a portion of its width to provide an opening therein spaced from the terminal end of said pouch.

Claim 15

Method for making a flat-storable, blast-hole liner which comprises: a. providing a length of flattened, flexible, heat-sealable tubing having upper and lower opened ends; b. sheathing said tubing for a portion of its length adjacent said lower end with a flattened, flexible, protective sheath member, which member extends for a short distance below the lower end of said tubing; c. sealing said sheath member to the lower end of said tubing by means of a transverse heat seal which provides a water-proof transverse seal across said lower end of said tubing; d. providing a flattened, flexible pouch member having a proximal end and a tapered, sealed distal end, said pouch member having a transverse slit in one wall thereof along a portion of its width to provide an opening therein spaced from said distal end; e. orienting said pouch member to lie flat against the lower portion of said sheath member, the proximal end of said pouch member being adjacent the lower end of said sheath member; and f. heat sealing said pouch member to said sheath member by means of a transverse heat seal adjacent their adjacent ends.

Claim 16

Method for making a flat-storable, blast-hole liner which comprises: a. providing a length of flattened, flexible, heat-sealable tubing having upper and lower opened ends; b. sheathing said tubing for a portion of its length adjacent said lower end with a flattened, flexible, protective sheath member, which member extends for a short distance below the lower end of said tubing; c. sealing said sheath member to the lower end of said tubing by means of a transverse heat seal which provides a water-proof transverse seal across said lower end of said tubing; d. providing a flattened, flexible pouch member having a proximal end and a tapered, sealed distal end, said pouch member having a transverse slit in one wall thereof along a portion of its width to provide an opening therein spaced from said distal end; e. orienting said pouch member to lie flat against the lower portion of said sheath member, the proximal end of said pouch member being adjacent the lower end of said sheath member; and f. heat sealing said pouch member to said sheath member by means of a transverse heat seal adjacent their adjacent ends.