US4409046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and an apparatus for producing disposable syringes and the disposable syringe produced
Assignee: Sortimat Creuz and Co GmbH
•
Filing: 1980-12-10
•
Granted: 1983-10-11
•
Expires: 2000-12-10
Abstract
Abstract A metallic syringe tube is fused to a plastic fitting into which the tube is inserted so that the inner end of the tube contacts the fitting, by clamping the tube between a counterelectrode which acts as an abutment for the inner end of the tube and a clamping jaw which engages the free end of the tube, and applying a resistance heating voltage to the tube between the counterelectrode and a location between the fitting and the clamping jaw for heating at least a portion of the syringe tube inner end in contact with the fitting to the melting temperature of the plastic forming the fitting.
Inventors
- 👤 Friedrich Holzwarth
- 👤 Gerhard Heinze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:47
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M25/00; A61M25/0009; A61M25/0014; A61M5/34; A61M5/343; B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/44; B29C65/56; B29C65/567; B29C65/568; B29C65/78; B29C65/7841; B29C65/7858; B29C65/7876; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/124; B29C66/1246; B29C66/12469; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C66/61; B29C66/612; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/74; B29C66/742; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81427; B29C66/81429; B29C66/83; B29C66/832; B29C66/8322; B29C66/71; B29C66/7428; B29C66/74283; B29C66/81411; B29C66/81415; B29C66/81417; B29C66/81421; B29C66/81422; B29C66/818; B29C66/8182; B29C66/81821; B29L; B29L2031/00; B29L2031/753; B29L2031/7544; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49906; Y10T29/49908; Y10T29/49915; Y10T29/4992; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
240 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting so that the inner end of the syringe tube contacts the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting for heating at least a portion of the syringe tube inner end in contact with the fitting to at least the melting temperature of the plastic forming the fitting, while at the same time displacing the clamping jaw and the counterelectrode relatively toward one another, the improvement wherein said step of applying a resistance heating voltage is carried out by applying such voltage between the counterelectrode and a location on the free end of the syringe tube between the fitting and the clamping jaw such that the voltage is applied along a length of the syringe tube which is shorter than the length of the syringe tube between the clamping jaw and the counterelectrode, and said method further comprises maintaining the length of the syringe tube along which the voltage is applied substantially constant during said step of temporarily applying.
Claim 2
Dependent Claim
240 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting so that the inner end of the syringe tube contacts the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting for heating at least a portion of the syringe tube inner end in contact with the fitting to at least the melting temperature of the plastic forming the fitting, while at the same time displacing the clamping jaw and the counterelectrode relatively toward one another, the improvement wherein said step of applying a resistance heating voltage is carried out by applying such voltage between the counterelectrode and a location on the free end of the syringe tube between the fitting and the clamping jaw such that the voltage is applied along a length of the syringe tube which is shorter than the length of the syringe tube between the clamping jaw and the counterelectrode, and said method further comprises maintaining the length of the syringe tube along which the voltage is applied substantially constant during said step of temporarily applying.
Claim 3
Dependent Claim
49 words
The method as claimed in claim 1, wherein the clamping jaw is displaced in the direction towards the fitting during the application of the resistance heating voltage, and the resistance heating voltage is applied to the free end of the syringe tube at an unvarying spacing from the fitting.
Claim 4
Dependent Claim
58 words
The method as claimed in claim 1 or 2 wherein a plurality of syringe tubes are fused simultaneously into a respective plurality of plastic fittings, and are subjected to a common resistance heating voltage, further comprising counting the number of syringe tubes gripped by the clamping jaw and adjusting the fusing conditions in accordance with the counting result.
Claim 5
Dependent Claim
52 words
The method as claimed in claim 1 or 2 wherein the syringe tubes are placed in a magazine and singled out by a separating slide means, and further comprising applying to each tube a withdrawal force which acts as a friction force on each syringe tube disposed in the separating slide means.
Claim 6
Dependent Claim
40 words
The method as claimed in claim 1 or 2, further comprising, before clamping the free end of the tube in the clamping jaw, fixing the syringe tube in a selected position relative to the clamping jaw by an auxiliary force.
Claim 7
Dependent Claim
49 words
The method as claimed in claim 5, wherein the syringe tube is thrown against a baffle face when being introduced into the clamping jaw, further comprising holding the syringe tube in abutment against the baffle face by a return force until the clamping jaw comes to clamp the tube.
Claim 8
Dependent Claim
41 words
The method as claimed in claim 5, wherein the syringe tube is brought into engagement with a surface having a selected position relative to the clamping jaw by an entrainment force which aligns the syringe tube in the open clamping jaw.
Claim 9
Dependent Claim
27 words
The method as claimed in claim 1 further comprising expanding a section of the syringe tube extending within the fitting for securing the tube to the fitting.
Claim 10
Dependent Claim
30 words
The method as claimed in claim 8 wherein said step of expanding is carried out by inserting into the syringe tube inner end an expansion mandrel also constituting the counterelectrode.
Claim 11
Dependent Claim
26 words
The method as claimed in claim 8 wherein said step of expanding is carried out by inserting into the syringe tube inner end an expansion mandrel.
Claim 12
Dependent Claim
16 words
The method as claimed in claim 10 wherein said step of inserting comprises rotating the mandrel.
Claim 13
Dependent Claim
16 words
The method as claimed in claim 10 wherein said step of inserting comprises vibrating the mandrel.
Claim 14
Dependent Claim
20 words
The method as claimed in claim 8 wherein a tension-proof and compression-resistant engagement is established by said step of expanding.
Claim 15
Dependent Claim
39 words
The method as claimed in claim 13 wherein the fitting is initially provided with a recess adjacent the inner end of the syringe and further comprising, during said step of expanding, filling the recess with material of the fitting.
Claim 16
Dependent Claim
27 words
The method as claimed in claim 13 wherein the fitting is provided with a preformed recess into which the tube is expanded during said step of expanding.
Claim 17
Dependent Claim
20 words
The method as claimed in claim 13, wherein the counterelectrode is applied to the inner surface of the syringe tube.
Claim 18
Dependent Claim
18 words
The method as claimed in claim 13 wherein a tension resistance of more than 3 kp is produced.
Claim 19
Dependent Claim
16 words
The method as claimed in claim 17 wherein the tension resistance is more than 8 kp.
Claim 20
Dependent Claim
49 words
The method as claimed in claim 13 further comprising, prior to said step of expanding, supporting the syringe tube on the shoulder of a constriction of an axial bore extending through the fitting, and wherein said step of expanding is carried out by passing a mandrel through the constriction.
Claim 21
Dependent Claim
35 words
The method as claimed in claim 19, wherein said step of supporting is carried out by supporting the syringe tube on the shoulder of the constriction by the outer zone of its wall thickness only.
Claim 22
Dependent Claim
29 words
The method as claimed in claim 1 further comprising, during said step of applying a resistance heating voltage, displacing the clamping jaw and the counterelectrode relatively towards each other.
Claim 23
Independent Claim
137 words
A method of producing a disposable syringe component composed of a syringe tube of metal and a fitting of a softenable or meltable material having a central bore, comprising inserting the syringe tube into the bore so that the syringe tube projects out of the fitting, expanding the syringe tube within the bore, and subsequent to expanding the syringe tube, deforming a portion of the fitting material by softening or melting that portion and displacing that portion to a position in front of the inner end of the syringe tube to form a constriction opposite the inner end of the syringe tube, such that in both axial directions of the syringe tube, material of the fitting is located opposite the expanded portion and the tube is connected to the fitting in a sealed, compression- and tension-resistant manner.
Claim 24
Independent Claim
137 words
A method of producing a disposable syringe component composed of a syringe tube of metal and a fitting of a softenable or meltable material having a central bore, comprising inserting the syringe tube into the bore so that the syringe tube projects out of the fitting, expanding the syringe tube within the bore, and subsequent to expanding the syringe tube, deforming a portion of the fitting material by softening or melting that portion and displacing that portion to a position in front of the inner end of the syringe tube to form a constriction opposite the inner end of the syringe tube, such that in both axial directions of the syringe tube, material of the fitting is located opposite the expanded portion and the tube is connected to the fitting in a sealed, compression- and tension-resistant manner.
Claim 25
Dependent Claim
28 words
The method as claimed in claim 22 comprising, prior to the deformation of the material, sealing the inner end of the syringe tube against access of plastic material.
Claim 26
Dependent Claim
149 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting, the improvement comprising supporting the syringe tube on the shoulder of a constriction of an axial bore extending through the fitting, and, after said step of supporting, laterally expanding the inner end of the syringe tube within the fitting by passing a mandrel through the constriction for securing the tube to, and establishing a tension-proof and compression-resistant engagement with, the fitting.
Claim 27
Dependent Claim
149 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting, the improvement comprising supporting the syringe tube on the shoulder of a constriction of an axial bore extending through the fitting, and, after said step of supporting, laterally expanding the inner end of the syringe tube within the fitting by passing a mandrel through the constriction for securing the tube to, and establishing a tension-proof and compression-resistant engagement with, the fitting.
Claim 28
Dependent Claim
35 words
The method as claimed in claim 24 wherein said step of supporting is carried out by supporting the syringe tube on the shoulder of the constriction by the outer zone of its wall thickness only.
Claim 29
Dependent Claim
150 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting, the improvement wherein the fitting is initially provided with a recess adjacent the inner end of the syringe tube, and comprising laterally expanding the inner end of the syringe tube within the fitting for securing the tube to, and establishing a tension-proof and compression-resistant engagement with, the fitting, and, during said step of expanding, filling the recess with material of the fitting.
Claim 30
Dependent Claim
150 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting, the improvement wherein the fitting is initially provided with a recess adjacent the inner end of the syringe tube, and comprising laterally expanding the inner end of the syringe tube within the fitting for securing the tube to, and establishing a tension-proof and compression-resistant engagement with, the fitting, and, during said step of expanding, filling the recess with material of the fitting.
Claim 31
Dependent Claim
125 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting, the improvement comprising laterally expanding the inner end of the syringe tube within the fitting, by inserting into the syringe tube inner end an expansion mandrel also constituting the counterelectrode, for securing the tube to the fitting.
Claim 32
Dependent Claim
125 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting, the improvement comprising laterally expanding the inner end of the syringe tube within the fitting, by inserting into the syringe tube inner end an expansion mandrel also constituting the counterelectrode, for securing the tube to the fitting.
Claim 33
Dependent Claim
130 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting, the improvement comprising laterally expanding the inner end of the syringe tube within the fitting by inserting an expansion mandrel into the syringe tube inner end for securing the tube to the fitting, wherein said step of inserting comprises rotating the mandrel.
Claim 34
Dependent Claim
130 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting, the improvement comprising laterally expanding the inner end of the syringe tube within the fitting by inserting an expansion mandrel into the syringe tube inner end for securing the tube to the fitting, wherein said step of inserting comprises rotating the mandrel.
Claim 35
Dependent Claim
130 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting, the improvement comprising laterally expanding the inner end of the syringe tube within the fitting by inserting an expansion mandrel into the syringe tube inner end for securing the tube to the fitting, wherein said step of inserting comprises vibrating the mandrel.
Claim 36
Dependent Claim
130 words
In a method for fusing a metallic syringe tube having an inner end and a free end into a plastic fitting by pushing the inner end of the syringe tube into the fitting, clamping the syringe tube between a counterelectrode which acts as an abutment for the inner end of the syringe tube and a clamping jaw which engages the free end of the syringe tube, and temporarily applying a resistance heating voltage between the counterelectrode and the free end of the syringe tube projecting from the fitting, the improvement comprising laterally expanding the inner end of the syringe tube within the fitting by inserting an expansion mandrel into the syringe tube inner end for securing the tube to the fitting, wherein said step of inserting comprises vibrating the mandrel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |