A method and apparatus are disclosed for transferring and filling a viscous material from a container into a syringe while preventing the ingress of gas into the viscous material during the process of filling the syringe with the viscous material, but without requiring a housing for holding both the
A method and apparatus are disclosed for transferring and filling a viscous material from a container into a syringe while preventing the ingress of gas into the viscous material during the process of filling the syringe with the viscous material, but without requiring a housing for holding both the container and the syringe in an air-tight manner. The method includes inserting a plunger into the container that holds the viscous material and inserting a first plug, which permits gas flow in one direction, into the syringe. Then, the container is coupled to the syringe, a rod is inserted into the syringe such that the rod engages with the first plug, and the plunger is pushed within the container, thereby extruding the viscous material from the container. As a result, the extruded viscous material is transferred into the syringe and the syringe is filled with the viscous material.
대표청구항▼
1. A method of transferring and filling a viscous material from a container into a syringe, wherein the container comprises:a container housing;a container inner chamber defined within the container housing for holding the viscous material; anda first opening and a second opening defined within the
1. A method of transferring and filling a viscous material from a container into a syringe, wherein the container comprises:a container housing;a container inner chamber defined within the container housing for holding the viscous material; anda first opening and a second opening defined within the container housing and in fluid communication with the container inner chamber, andthe syringe comprises:a syringe housing;a syringe inner chamber defined within the syringe housing for being filled with and transferring the viscous material from the container; anda third opening and a fourth opening defined within the syringe housing and in fluid communication with the syringe inner chamber,the method comprising:inserting a plunger into the container through the first opening while the viscous material is retained in the container, thereby providing a container set to be held in position;inserting a first plug into the syringe while being in slidable contact with the syringe, whereby a syringe set preparation step provides a syringe set, the first plug inserted within the syringe separating the syringe inner chamber into a first sub-chamber closer to the third opening and a second sub-chamber closer to the fourth opening, the first plug further permitting gas flow in a direction from the first sub-chamber to the second sub-chamber, restricting a flow of viscous material in the same direction, and preventing a flow of gas and viscous material in the reverse direction, the syringe set being retained in position such that the third opening of the syringe is detachably connected in a substantially air-tight manner with the second opening of the container;a rod insertion step that inserts a rod into the syringe so that the rod engages with the first plug in the syringe, thereby applying a force to the first plug in a direction that reduces the volume of the first sub-chamber;an extrusion and filling step that pushes the plunger into the container towards the second opening, thereby extruding the viscous material from the container through the second opening, and thereby transferring the viscous material from the container into the first sub-chamber of the syringe, andan assisting step that assists the movement of the rod that follows movement of the first plug within the syringe as the amount of viscous material filling the first sub-chamber increases, by applying a force to the rod in a direction that increases the volume of the first sub-chamber. 2. The method according to claim 1, further comprising a step that holds the container set in an inverted orientation positioning the first opening below the second opening, wherein the extrusion step upwardly pushes the plunger towards the second opening of the container, thereby transferring the and filling the viscous material from the container into the first sub-chamber of the syringe in the opposite direction to gravity. 3. The method according to claim 1, wherein the syringe has an inner circumferential surface that has a circular cross-section and defines the syringe inner chamber, the first plug is made by molding an elastically deformable material into a cup shape, thereby providing the first plug with a silhouette of a circle having an outer diameter that is substantially equal to an inner diameter of the inner circumferential surface,the first plug has an anterior end portion and a posterior end portion,the method further comprising a step that inserts the first plug into the syringe, with the anterior end portion located within the inner circumferential surface and facing the third opening, and with the posterior end portion in contact with the inner circumferential surface. 4. A method of transferring and filling a viscous material from a container into a syringe, wherein the container comprises:a container housing;a container inner chamber defined within the container housing for holding the viscous material; anda first opening and a second opening defined within the container housing and in fluid communication with the container inner chamber, andthe syringe comprises:a syringe housing;a syringe inner chamber defined within the syringe housing for being filled with and transferring the viscous material from the container; anda third opening and a fourth opening defined within the syringe housing and in fluid communication with the syringe inner chamber,the method comprising:inserting a plunger into the container through the first opening while the viscous material is retained in the container, thereby providing a container set to be held in position;inserting a first plug into the syringe while being in slidable contact with the syringe, whereby a syringe set preparation step provides a syringe set, the first plug inserted within the syringe separating the syringe inner chamber into a first sub-chamber closer to the third opening and a second sub-chamber closer to the fourth opening, the first plug further permitting gas flow in a direction from the first sub-chamber to the second sub-chamber, restricting a flow of viscous material in the same direction, and preventing a flow of gas and viscous material in the reverse direction, the syringe set being retained in position such that the third opening of the syringe is detachably connected in a substantially air-tight manner with the second opening of the container;a rod insertion step that inserts a rod into the syringe so that the rod engages with the first plug in the syringe, thereby applying a force to the first plug in a direction that reduces the volume of the first sub-chamber; andan extrusion and filling step that pushes the plunger into the container towards the second opening, thereby extruding the viscous material from the container through the second opening, and thereby transferring the viscous material from the container into the first sub-chamber of the syringe,wherein the rod is a vacuum tube capable of transmitting a compressive force in the axial direction,the vacuum tube is equipped with a second plug, and the vacuum tube is inserted into the syringe and penetrates through the second plug in a substantially air-tight manner,the second plug, when inserted within the syringe, separates the second sub-chamber into a third sub-chamber closer to the first plug and a fourth sub-chamber closer to the fourth opening,the second plug prevents both a first gas flow from the third sub-chamber towards the fourth sub-chamber and a second gas flow that is a reverse gas flow to the first gas flow, or only the second gas flow,the vacuum tube, when inserted into the syringe, is in fluid communication with the third sub-chamber, andthe rod inserting step inserts the vacuum tube and the second plug into the syringe, with the second plug in slidable contact with the inner circumferential surface of the syringe,the method further comprising an evacuation step that evacuates the third sub-chamber by suctioning gas from the third chamber via the vacuum tube, thereby evacuating the first sub-chamber. 5. The method according to claim 4, wherein the second plug has substantially the same shape as that of the first plug, and the rod inserting step inserts the second plug into the syringe, with the second plug and the first plug arranged in series in the same orientation. 6. A method of transferring and filling a viscous material from a container into a syringe, wherein the container comprises:a container housing;a container inner chamber defined within the container housing for holding the viscous material; anda first opening and a second opening defined within the container housing and in fluid communication with the container inner chamber, andthe syringe comprises:a syringe housing;a syringe inner chamber defined within the syringe housing for being filled with and transferring the viscous material from the container; anda third opening and a fourth opening defined within the syringe housing and in fluid communication with the syringe inner chamber,the method comprising:inserting a plunger into the container through the first opening while the viscous material is retained in the container, thereby providing a container set, the container set being held in position in an inverted orientation in which the first opening is located below the second opening;inserting a first plug into the syringe while being in slidable contact with the syringe, whereby a syringe set preparation step provides a syringe set, the first plug inserted within the syringe separating the syringe inner chamber into a first sub-chamber closer to the third opening and a second sub-chamber closer to the fourth opening, the first plug further permitting gas flow in a direction from the first sub-chamber to the second sub-chamber, restricting a flow of viscous material in the same direction, and preventing a flow of gas and viscous material in the reverse direction, the syringe set being held in position with the third opening of the syringe detachably connected with the second opening of the container in a substantially air-tight manner;a rod inserting step that inserts a rod into the syringe so that the rod engages with the first plug in the syringe, thereby applying to the first plug a force that positions the first plug at an advancing limit of the first plug, which is located in proximity to the third opening within the syringe, and that urges the first plug towards the advancing limit, the first plug upwardly moving from the advancing limit towards the fourth opening as the amount of viscous material filling the first sub-chamber increase, the rod moving upward following the upward movement of the first plug;an extrusion step that pushes the plunger from the first opening within the container towards the second opening, thereby extruding the viscous material from the container through the second opening, and thereby transferring and filling the viscous material from the container into the first sub-chamber of the syringe in an opposite direction to gravity; andan assisting step that assists upward movement of the rod, which follows upward movement of the first plug, by applying an upward force to the rod.
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이 특허에 인용된 특허 (3)
Boiardi Mario (Queenstown MD), Dispenser for flowable materials.
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