Process of manufacturing a breathing bag and breathing bag manufactured by such process

Process for forming a breathing bag including a connector portion and a distensible portion;

• comprising the steps of:
• extruding a tubular parison of thermoplastic material;
• and
• molding a first portion of said parison into the connector portion of the breathing bag and to have a first wall thickness sufficiently thick to permit said connector portion to be connected directly to a male fitting, and molding a second portion of said parison into the distensible portion of the breathing bag and to have a second wall thickness sufficiently thin to permit said distensible portion to expand and contract in delivering or assisting in delivering gas to a patient, said second wall thickness being smaller than said first wall thickness.

Process for manufacturing a breathing bag including a connector portion and a distensible portion, comprising steps of:

• extruding a tubular parison of thermoplastic material between a pair of open molds including opposed forming portions complementary in shape to the exterior of the connector portion of the breathing bag and including a pair of opposed mold cavities complementary in shape to the distensible portion of the breathing bag;
• inserting a combination blowing and forming member into a first portion of said parison, said forming member including an outer surface complementary in shape to the interior shape of the connector portion;
• and
• closing said molds to cause said forming portions of said molds to engage a first portion of said parison to form said first portion of parison into the connector portion of the breathing bag between said forming portions of said molds and said outer surface of said combination blowing and forming member and applying pressurized air through said combination blowing and forming member into the interior of a second portion of said parison and applying vacuum to the outer surface of said second portion of said parison to force said second portion of said parison into engagement with said mold cavities to form said second portion of said parison into said distensible portion of the breathing bag.

Process for manufacturing a breathing bag including a connector portion and a distensible portion, comprising steps of:

• extruding a tubular parison of thermoplastic material vertically downwardly to cause the upper portion of said parison to reside between a pair of opposed open molds provided with opposed cavities complementary in shape to the distensible portion of the breathing bag and to cause the lower portion of said parison to pass over a combination blowing and forming member provided with an exterior complementary in shape to the interior of the connector portion of the breathing bag, and said molds further provided with opposed forming members complementary in shape to the exterior of the connector portion of the breathing bag;
• allowing said lower portion of said parison to increase in thickness under the influence of gravity;
• and
• closing said molds and applying pressurized air through said combination blowing and forming member to the interior of said upper portion of said parison and applying vacuum to the exterior of said upper portion of said parison to expand said upper portion of said parison into said mold cavities to form said upper portion of said parison into the distensible portion of the breathing bag and to cause said forming portions of said molds to engage said lower portion of said parison and force said lower portion of said parison against the exterior of said combination blowing and forming member to compression form said lower portion of said parison into the connector portion of the breathing bag.

Process for manufacturing a breathing bag including a connector portion and a distensible portion, comprising steps of:

• extruding a tubular parison of thermoplastic material between a pair of open molds including opposed forming portions complementary in shape to the exterior of the connector portion of the breathing bag and including a pair of opposed mold cavities complementary in shape to the distensible portion of the breathing bag;
• inserting a combination blowing and forming member into a first portion of said parison, said forming member including an outer surface complementary in shape to the interior shape of the connector portion;
• and
• closing said molds to cause said forming portions of said molds to engage a first portion of said parison to form said first portion of parison into the connector portion of the breathing bag between said forming portions of said molds and said outer surface of said combination blowing and forming member and to have a first wall thickness sufficiently thick to permit said connector portion to be connected directly to a male fitting, and applying pressurized air through said combination blowing and forming member into the interior of a second portion of said parison to force said second portion of said parison into engagement with said mold cavities to form said second portion of said parison into said distensible portion of the breathing bag and to have a second wall thickness sufficiently thin to permit said distensible portion to expand and contract in delivering or assisting in delivering gas to a patient, said second wall thickness being smaller than said first wall thickness.

Process for manufacturing a breathing bag including a connector portion and a distensible portion, comprising steps of:

• extruding a tubular parison of thermoplastic material vertically downwardly to cause the upper portion of said parison to reside between a pair of opposed open molds provided with opposed cavities complementary in shape to the distensible portion of the breathing bag and to cause the lower portion of said parison to pass over a combination blowing and forming member provided with an exterior complementary in shape to the interior of the connector portion of the breathing bag, and said molds further provided with opposed forming members complementary in shape to the exterior of the connector portion of the breathing bag;
• allowing said lower portion of said parison to increase in thickness under the influence of gravity;
• and
• closing said molds and applying pressurized air through said combination blowing and forming member to the interior of said upper portion of said parison to expand said upper portion of said parison into said mold cavities to form said upper portion of said parison into the distensible portion of the breathing bag by blow molding and to have a wall thickness sufficiently thin to permit said distensible portion to expand and contract in delivering or assisting in delivering gas to a patient and to have a first wall thickness and to cause said forming portions of said molds to engage said lower portion of said parison and force said lower portion of said parison against the exterior of said combination blowing and forming member to compression mold said lower portion of said parison into the connector portion of the breathing bag and to have a second wall thickness greater than said first wall thickness and to be sufficiently thick to permit said connector portion to be converted directly to a male fitting.