Syringe cartridge and method
First Claim
1. A syringe comprising, in combination,a cylindrical cartridge having two open ends,movable plunger means for closing one end of the cartridge,a first closure means for the other end of the cartridge for displacement of product within the cartridge to achieve predetermined head space therein,and a second closure means removably secured to said first closure means,said second closure means having reseal means interacting with said first closure means to reseal with predetermined head space by displacing a portion of product in the first closure means.
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Accused Products
Abstract
Disclosed is a method for filling a cartridge which can be subsequently capped and closed. This is done by filling to a discrete level and then applying a closure. A displacement dome is provided at the lower portion of the syringe cartridge closure to first displace a predetermined amount of air or gas and then to displace a minor amount of fluid upon closure to seal the cartridge, and insure zero head space. The entirety of the process of filling is done in a vented environment, and the closure applied at ambient. The invention also provides an apparatus which includes a syringe cartridge having its open lower portion closed by a plunger piston. The upper portion is closed by a syringe cartridge closure having a leur tip cap. Means are optionally provided interiorly of the tip cap to retain a hollow needle, which is held in position by a leur tip, the latter being vented and provided with a seal for the needle. The piston plunger at the lower portion of the cartridge can be advanced, desirably by a second plunger, to empty the contents. Upon resealing, the leur tip cap is applied over the leur tip after a bead is formed on the tip. The tip cap then penetrates the leur tip, or optionally the interior of the hollow needle thus completely reclosing the cartridge and sealing the same for storage until intended for further use.
88 Citations
14 Claims
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1. A syringe comprising, in combination,
a cylindrical cartridge having two open ends, movable plunger means for closing one end of the cartridge, a first closure means for the other end of the cartridge for displacement of product within the cartridge to achieve predetermined head space therein, and a second closure means removably secured to said first closure means, said second closure means having reseal means interacting with said first closure means to reseal with predetermined head space by displacing a portion of product in the first closure means.
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6. A syringe cartridge comprising, in combination,
a cartridge of elongate cylindrical configuration having two open ends, a plunger piston sealing the lower open end of said cartridge, a syringe cartridge closure secured to the upper open end of the cartridge, a leur tip having a dispensing end extending from said closure, a leur tip cap proportioned to reclosably cover the dispensing end of the leur tip, a leur tip bore centrally and longitudinally of the leur tip, a diaphragm at the lower portion of said leur tip bore and closing the same to contents of the cartridge, an inverted dome at the lower portion of the closure defining a predetermined head space relationship between the closure, cartridge, and contents, the leur tip cap being proportioned for positioning over the leur tip.
Specification