Glass tube and thermoplastic resin finger grip sleeve assembly

• US 3,978,858 A
• Filed: 03/18/1974
• Issued: 09/07/1976
• Est. Priority Date: 11/11/1971
• Status: Expired due to Term

• Current Assignee: MPL Ltd.
• Original Assignee: MPL Ltd.
• Inventors: Tischlinger, Edward A.
• Primary Examiner(s): Yasko, John D.
• Application Number:
  US05/451,962
• Time in Patent Office: 904 Days
• Field of Search: 128/218 N, 128/218 D, 128/218 M, 128/215, 128/218 P, 128/218 PA, 128/218 R, 128/218 C, 128/234, 128/235, 128/237, 128/238, 128/261, 128/218 NV, 215/246, 215/317, 222/386, 264/271, 264/291, 264/292
• US Class Current: 604/187
• CPC Class Codes: A61M 2005/3139 Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips
• CPC Class Codes: A61M 5/178 Syringes
• CPC Class Codes: A61M 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: B29C 65/565 involving interference fits, e.g. force-fits or press-fits B29C65/66 takes precedence
• CPC Class Codes: B29C 65/665 using shrinking during cooling
• CPC Class Codes: B29C 66/112 Single lapped joints
• CPC Class Codes: B29C 66/1222 comprising at least a lapped joint-segment
• CPC Class Codes: B29C 66/1224 comprising at least a butt joint-segment
• CPC Class Codes: B29C 66/131 Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
• CPC Class Codes: B29C 66/24221 being circular B29C66/51 takes precedence
• CPC Class Codes: B29C 66/3032 making use of protrusions or cavities belonging to at least one of the parts to be joined B29C66/3034 takes precedence
• CPC Class Codes: B29C 66/5344 said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends B29C66/5346 takes precedence
• CPC Class Codes: B29C 66/7465 Glass
• CPC Class Codes: B29C 66/8322 Joining or pressing tools reciprocating along one axis
• CPC Class Codes: B29L 2031/7544 Injection needles, syringes

Abstract

A glass tube and thermoplastic resin finger-grip sleeve assembly in which the finger-grip sleeve is cam-stretched onto and frictionally retained on a glass tube, which is a section of die-formed glass tubing. Increase in latitude of operable interference fit and stretch is effected by assembling the finger-grip sleeve in a heated condition.

Claims

1. A glass tube and non-glass finger grip arrangement for use particularly in packaging and subsequent dispensing of chemicals, comprising a length of substantially constant diameter die-formed glass tube having a peripheral wall with a die-formed bore and outer annular surface, the diameters both of which bore and outer annular surface are each at least several times the thickness of said peripheral wall whereby said glass tube is thin-walled relative to both its outer and bore diameters,

and a sleeve of thermoplastic resin having a laterally extending finger-grip protrusion integrally formed thereon,

said sleeve having an annularly substantially continuous substantially constant diameter inner bore wall in solely friction-retained engagement in a stretched-fit friction-retained state over and along one end of said glass tube,

the diameters of both the bore and the outer annular surface of said glass tube being at least several times the wall thickness of the longitudinally extent of said sleeve extending over and along said glass tube.

said tube having raised surface projections on the outer annular surface beneath and contiguous with the inner surface of said sleeve, said surface projections being of substantially smaller radial thickness than the adjoining overlying portion of said sleeve.

2. An arrangement according to claim 1,

said surface projections being bonded printing on the outer surface of said glass tube.

3. An arrangement according to claim 1,

said surface projections being graduations formed on said glass tube.

4. An arrangement according to claim 1,

said projections being superimposed lines of fine glass particulate fused to said glass tube surface.

5. An arrangement according to claim 4,

said projections being superimposed lines of cured resin adhered to said glass tube surface.