Method of making a frangible port protector

• US 4,415,393 A
• Filed: 10/22/1981
• Issued: 11/15/1983
• Est. Priority Date: 10/22/1981
• Status: Expired due to Term

• Current Assignee: Baxter Travenol Laboratories Incorporated (Baxter International Inc.)
• Original Assignee: Baxter Travenol Laboratories Incorporated (Baxter International Inc.)
• Inventors: Grimes, Robert G.
• Primary Examiner(s): Weston, Caleb
• Application Number:
  US06/313,568
• Time in Patent Office: 754 Days
• Field of Search: 156/244.13, 156/244.18, 156/249, 156/257, 156/268, 156/293, 156/294, 156/304.2, 156/304.3, 128/214 R, 128/214 D, 128/214 C, 128/272, 83/187, 83/875, 83/879, 83/880, 83/881, 83/886, 222/107, 222/541, 215/32, 215/33, 215/34, 215/35, 215/232, 206/484, 206/484.2, 220/266, 220/267, 220/268, 220/269, 220/276, 220/277
• US Class Current: 156/244.13
• CPC Class Codes: A61J 1/10 Bag-type containers
• CPC Class Codes: B29C 2793/00 Shaping techniques involving a cutting or machining operation
• CPC Class Codes: B29C 59/007 Forming single grooves or ribs, e.g. tear lines, weak spots by moulding B29C37/0057; folding lines B29C53/06; in metal articles B21D17/00; by cutting B26D3/08
• CPC Class Codes: B29C 65/02 by heating, with or without pressure
• CPC Class Codes: B29C 65/04 Dielectric heating, e.g. high-frequency welding , i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/133 Fin-type joints, the parts to be joined being flexible the parts to be joined being rigid B29C66/1312
• CPC Class Codes: B29C 66/24221 being circular B29C66/51 takes precedence
• CPC Class Codes: B29C 66/53262 Enclosing spouts between the walls of bags, e.g. of medical bags
• CPC Class Codes: B29C 66/636 using a support which remains in the joined object
• CPC Class Codes: B29C 66/65 with a relative motion between the article and the welding tool B29C65/10, B29C65/12 take precedence
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29K 2027/06 PVC, i.e. polyvinylchloride
• CPC Class Codes: B29L 2023/00 Tubular articles B29L2024/00 takes precedence ; catheters B29L2031/7542
• CPC Class Codes: B29L 2031/7148 Blood bags, medical bags
• CPC Class Codes: Y10T 156/1064 Partial cutting [e.g., grooving or incising]

Abstract

A method of manufacturing a tear-off port protector for a container comprises placing flexible, typically extruded tubing on a mandrel that fills the bore of the tubing, with the tubing preferably outwardly stretched by the mandrel. A cutting blade is spaced a predetermined distance of less than the tubing wall thickness from the mandrel. One then causes the cutting blade to form an annular cut about the tubing, while maintaining the predetermined distance, and thereafter one removes the tubing from the mandrel.

Claims

1. The method of manufacturing a tear-off port protector carried on a container which comprises placing extruded plastic tubing on a mandrel that fills the bore of said tubing and stretches the tubing;

spacing a cutting blade a predetermined distance of less than the tubing wall thickness from the mandrel and rotating said mandrel and tubing carried thereon, causing the cutting blade to form an annular cut about the tubing while maintaining the predetermined distance;

removing the tubing from the mandrel, closing one end of the tubing, and sealing the outside surface of the other end of the tubing to said container with an access port positioned in telescoping relation inside of said tubing, said tubing sealed to the access port through a spacer bushing positioned within said tubing, whereby tearing open of said tubing along the annular cut exposes the access port.

2. The method of claim 1 in which the closed end of said tubing is sealed shut.

3. The method of claim 2 in which said predetermined distance is from 0.005 to 0.01 inch.

4. The method of claim 3 in which the wall thickness of said tubing is from 0.02 to 0.05 inch.

5. The method of claim 4 in which said tubing has an inner diameter of 0.2 to 0.35 inch.