Method and apparatus to insert stoppers into prefilled syringes
First Claim
Patent Images
1. An apparatus for inserting stoppers into prefilled syringes comprising:
- (a) a stopper tube movement within a base;
(b) a stopper tube attached to the stopper tube movement;
(c) at least one radial vacuum port in the stopper tube, said ports connecting to a vacuum means;
(d) a sealing element attached to the circumference of the stopper tube;
(e) a stopper ram movement within the base, mounted adjacent to the stopper tube movement;
(f) a stopper ram affixed to the stopper ram movement, aligned within the stopper tube; and
(g) stoppers temporarily affixed to the stopper ram movement, wherein sequential timed motion of the stopper tube movement and the stopper ram movement, with vacuum application, inserts the stoppers into the syringe above a prefilled liquid.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus and method for inserting a stopper into a medical syringe minimizing the amount of entrapped air between the stopper and the contained liquid. The apparatus in a first embodiment utilizes a vacuum to assist inserting the stopper within the syringe. In a second embodiment a vacuum is used to transport the stopper and cause the insertion into the syringe. This method eliminates a mechanical device that transports the stopper to the syringe.
17 Citations
14 Claims
-
1. An apparatus for inserting stoppers into prefilled syringes comprising:
-
(a) a stopper tube movement within a base;
(b) a stopper tube attached to the stopper tube movement;
(c) at least one radial vacuum port in the stopper tube, said ports connecting to a vacuum means;
(d) a sealing element attached to the circumference of the stopper tube;
(e) a stopper ram movement within the base, mounted adjacent to the stopper tube movement;
(f) a stopper ram affixed to the stopper ram movement, aligned within the stopper tube; and
(g) stoppers temporarily affixed to the stopper ram movement, wherein sequential timed motion of the stopper tube movement and the stopper ram movement, with vacuum application, inserts the stoppers into the syringe above a prefilled liquid. - View Dependent Claims (2, 3)
-
-
4. A method for inserting stoppers into prefilled syringes in an apparatus comprising a stopper tube having a vacuum means port and a sealing element, a stopper tube movement affixed to the stopper tube, a stopper ram, and a stopper ram movement affixed to the stopper ram, the method comprising the steps of:
-
(a) inserting the stopper into the stopper tube above the vacuum means port by lowering the stopper ram movement, stopper tube movement and attached stopper;
(b) lowering the stopper tube movement and the stopper ram movement until the sealing element seals against the syringe thereby creating a vacuum chamber including the syringe and stopper tube;
(c) evacuating the chamber to a vacuum;
(d) lowering the stopper ram and stopper below the vacuum means port and out of the stopper tube into the syringe;
(e) venting to atmospheric pressure, the stopper tube and space above the stopper thereby forcing the stopper to a position close to a prefilled liquid; and
then(f) raising the stopper ram and stopper tube up to the home position immediately prior to step (a). - View Dependent Claims (5, 6)
-
-
7. An apparatus for inserting stoppers into prefilled syringes using a vacuum, the apparatus comprising:
-
(a) a stopper tube movement within a base;
(b) a stopper tube attached to the stopper tube movement;
(c) at least one radial vacuum port in the stopper tube, said ports connecting to vacuum means;
(d) a sealing element attached to the circumferences of the stopper tube;
(e) stopper transport device having a first end attached to the top of the stopper tube; and
(f) means for feeding stoppers into a second end of the stopper transport device, wherein sequential operation of the stopper tube movement and application of vacuum and atmospheric pressure inserts the stoppers into the syringes. - View Dependent Claims (8, 9)
-
-
10. A method for inserting stoppers into prefilled syringes in an apparatus comprising a stopper tube having a vacuum means port and a sealing element, a mechanical arm affixed to the stopper tube, and a stopper transport device affixed to the top of the stopper tube, the method comprising the steps of:
-
(a) lowering the mechanical arm and stopper tube until the sealing element seals at the top of the syringe;
(b) feeding a stopper into an open end of the stopper transport device;
(c) activating a vacuum in the stopper tube, syringe and transport device thereby transporting the stopper to the top of the stopper tube;
(d) activating a higher vacuum in the stopper tube and syringe thereby inserting the stopper into the syringe above a prefilled liquid; and
then(e) raising the mechanical arm and stopper tube up to the home position immediately prior to step (a). - View Dependent Claims (11, 12, 13, 14)
-
Specification