DE660774C - Method of making Pezzer catheters - Google Patents

Method of making Pezzer catheters

Info

Publication number
DE660774C
DE660774C DER94814D DER0094814D DE660774C DE 660774 C DE660774 C DE 660774C DE R94814 D DER94814 D DE R94814D DE R0094814 D DER0094814 D DE R0094814D DE 660774 C DE660774 C DE 660774C
Authority
DE
Germany
Prior art keywords
head
glued
rubber
catheters
pezzer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DER94814D
Other languages
German (de)
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RUESCH FA
Original Assignee
RUESCH FA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RUESCH FA filed Critical RUESCH FA
Priority to DER94814D priority Critical patent/DE660774C/en
Priority to FR799593D priority patent/FR799593A/en
Application granted granted Critical
Publication of DE660774C publication Critical patent/DE660774C/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0009—Making of catheters or other medical or surgical tubes
    • A61M25/001—Forming the tip of a catheter, e.g. bevelling process, join or taper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/26—Hot fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/70—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73751—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized
    • B29C66/73752—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized the to-be-joined areas of both parts to be joined being uncured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only

Description

Verfahren zum Herstellen von Pezzerkathetern Bei der Herstellung von sogenannten Pezzerkathetern aus Weichkautschuk zur Verwendung bei Blasenleiden o. dgl., die einen erweiterten Kopf mit Spitze und entsprechenden Öffnungen haben, hat man bisher vielfach auf das Katheterrohr einen aus mehreren Lappen bestehenden Kopf aufgeklebt und diese Lappen mit einer Spitze aus Weichkautschuk verbunden. Bei der Einführung dieser Katheter in die Blase mit Hilfe eines Dornes tritt infolge der sich dabei ergebenden Spannungen häufig ein Lösen oder Verschieben der einzelnen Teile an den Klebestellen auf, wodurch der Katheter unbrauchbar wird. Es ist bereits bekannt, das Schlauchende zu erweitern und als Kopfunterteil auszubilden und auf dieses einen schalen- oder schüsselförmigen Kopfteil aufzusetzen. Auch diese Ausführungsart soll sich aber nicht bewährt haben, da bei der Dehnung das Schlauchendstück ungleichmäßig beansprucht wird und dadurch gleichfalls leicht Störungen hervorgerufen werden.Method of making Pezzer catheters In the manufacture of so-called Pezzer catheters made of soft rubber for use in bladder problems or the like. the like, which have an enlarged head with a tip and corresponding openings, So far, one has in many cases one consisting of several lobes on the catheter tube Glued on the head and connected these flaps with a tip made of soft rubber. When introducing this catheter into the bladder with the help of a spike occurs as a result the resulting tensions often result in a loosening or shifting of the individual Split up at the splices, rendering the catheter unusable. It is already known to expand the hose end and to train as a lower head part and on to put this on a bowl-shaped or bowl-shaped headboard. Also this type of execution but should not have proven itself, since the hose end piece is unevenly when it is stretched is stressed and this also easily causes disturbances.

Man hat auch schon versucht, das. ganze Katheterrohr aus zwei an der Kopfstelle entsprechend verbreiterten Kautschukstreifen zusammenzusetzen, die durch zwei Längsnähte miteinander verbunden werden; dadurch werden aber an den am stärksten beanspruchten Dehnungsstellen Nähte gebildet, die infolge der ungünstigen Form der zu verbindenden Kanten leicht undicht werden und sich verschieben. Ebensowenig kann ein gleichfalls bekanntes Verfahren befriedigen, bei welchem der zum Herstellen des Katheters dienende Kautschukstreifen an der Kopfstelle verstärkt und sodann an dieser Stelle so weit ausgedehnt wird, daß die gewünschte pilzförmige Gestalt entsteht; der Kopfteil wird hierbei sehr ungleichmäßig gedehnt und bleibt wenig widerstandsfähig.Attempts have also been made to attach the whole catheter tube from two to the Head end to assemble accordingly widened rubber strips, which through two longitudinal seams are connected to one another; but this will be the strongest stressed expansion points formed as a result of the unfavorable shape of the seams Edges to be connected easily leak and shift. Neither can satisfy an equally known method in which to manufacture of the catheter serving rubber strips at the head end and then is expanded so far at this point that the desired mushroom shape arises; the head part is stretched very unevenly and remains little resilient.

Allen diesen bekannten Verfahren ist das Bestreben gemeinsam, den ganzen Katheter einschließlich des Kopfteiles möglichst aus einem einzigen gegebenenfalls entsprechend verstärkten Kautschukstreifen herzustellen. Es soll aber auf diese Weise eine vollständig befriedigende Lösung nicht erzielt worden sein.All these known methods have in common the endeavor, the whole catheter including the head part if possible from a single one to produce appropriately reinforced rubber strips. But it should be based on this Way, a completely satisfactory solution would not have been achieved.

Von den bekanntgewordenen Verfahren zum Herstellen von Pezzerkathetern unterscheidet sich das Verfahren gemäß der Erfindung dadurch, daß der Kopfteil aus zwei von dem eigentlichen Schlauch unabhängigen Kautschukscheiben gebildetwird, die zugleich mit der Formgebung fest mit dem Schlauch und untereinander verbunden werden. Zu diesem Zwecke wird gemäß der Erfindung der aus einer flachen, gelochten Scheibe aus Weichkautschuk bestehende Kopfunterteil über das abgefaßte Ende des aus gleichem Stoffe bestehenden Schlauches gezogen und mit dessen nach außen umgebördeltem Rande verklebt; sodann wird der Kopfunterteil mit dem gleichfalls aus einer Kautschukscheibe gebildeten Kopfoberteil in Formen mit einem Kern gepreßt, und schließlich werden nach Abschneiden des Formgrates sowie Entfernen des Kernes die beiden Teile zusammengeklebt und vulkanisiert. Vorteilhaft wird beim Forinen des Kopfoberteiles eine Spitzenverstärkung eingeklebt und mit verformt, die aus einem auf einer Seite geschlossenen Schlauch-oder Plattenstück besteht.Of the known methods for manufacturing Pezzer catheters differs the method according to the invention in that the head part two rubber disks independent of the actual hose are formed, which at the same time with the shape firmly connected to the hose and to each other will. For this purpose, according to the invention, from a flat, perforated Washer made of soft rubber head base over the beveled end of the Pulled from the same material existing hose and with its flanged to the outside Edge glued; then the lower head part with the is also made of a rubber washer formed head top into molds with a core, and finally be pressed after cutting off the molding and removing it of the core the two Parts glued together and vulcanized. It is advantageous when shaping the top of the head a tip reinforcement glued in and deformed with that made one on one side closed piece of hose or plate.

Die Vulkanisation des ganzen Werkstückes erfolgt in bekannter Weise in Heißdampf oder warmer Luft. Nach der Vulkanisation werden die Formteile entfernt, der Verbinclungsrand abgeschliffen und die Öffnungen eingeschnitten, worauf das Katheter fertig ist.The entire workpiece is vulcanized in a known manner in superheated steam or warm air. After vulcanization, the molded parts are removed, the connection edge sanded off and the openings cut, whereupon the Catheter is ready.

Durch diese Art der Herstellung wird dem Auftreten ungünstiger Ausgangsspannungen in den Kopfteilen des Katheters von vornherein vorgebeugt. Zugleich wird eine genaue Formgebung ermöglicht. Die Verbindungsnähte lassen sich hierbei so ausführen, daß eine Lockerung oder Lösung beim Einführen des Katheters in die Leibeshöhlung mit Sicherheit vermieden- wird. Dadurch, daß die einzelnen Bestandteile im vulkanisierten Zustande miteinander verklebt «-erden, wird eine vollständig dichte Verbindung erzielt.This type of manufacture prevents unfavorable output voltages from occurring leaned forward in the head parts of the catheter. At the same time it is an accurate Shaping made possible. The connecting seams can be carried out in such a way that loosening or loosening when inserting the catheter into the body cavity Security is avoided. Because the individual components in the vulcanized If they are glued to one another, a completely tight connection is achieved.

Das Herstellungsverfahren gemäß der Erfindung sowie die dazu benötigten Formteile und die danach hergestellten Katheter sind nachstehend an Hand eines in der Zeichnung dargestellten Ausführungsbeispieles kurz beschrieben, wobei in schematischer Form die wichtigsten Arbeitsstufen des Herstellungsvorganges wiedergegeben sind.The manufacturing method according to the invention and the necessary for it Molded parts and the catheters produced thereafter are shown below on the basis of an in The embodiment shown in the drawing briefly described, with in schematic Form the most important work stages of the manufacturing process are shown.

Der rohe Gummischlauch i wird zunächst an dem Kopfende bei -2 abgefast (Fig. i). Der aus einer kreisförmigen Gummiplatte 3 mit genau ausgestanzter Lochung 4 bestehende Kopfunterteil (Fig. 2) wird sodann über das vordere Schlauchende geschoben und letzteres nach außen erweitert und bei 5 umgebördelt und mit dem Kopfunterteil verklebt (Fig. 3).The raw rubber hose i is first beveled at the head end at -2 (Fig. I). The one made of a circular rubber plate 3 with precisely punched holes 4 existing head lower part (Fig. 2) is then pushed over the front end of the hose and the latter expanded outwards and flanged at 5 and with the lower head part glued (Fig. 3).

Der Kopfoberteil wird nach Fig. d. gleichfalls aus einer unvulkanisierten Kautschukplatte 6 gebildet, die in eine Form 7 eingedrückt wird. Gleichzeitig wird ein zur Verstärkung der Spitze dienendes geschlossenes Schlauchendstück 8 oder ein massives Gummistück eingelegt und mit der Scheibe 6 verklebt.The head top is according to Fig. D. also from an unvulcanized one Rubber plate 6 is formed, which is pressed into a mold 7. At the same time will a closed hose end piece 8 or a serving to reinforce the tip Solid rubber piece inserted and glued to disk 6.

Der Schlauch i mit dem Kopfunterteil wird gleichfalls in eine Form g gebracht, die an ihrem unteren Ende io konisch erweitert und an ihrem oberen Ende entsprechend derKopfform zu einem Teller i i ausgebildet ist. Die Formgebung sämtlicher Teile erfolgt sodann mit Hilfe i von Kernen 12 und 13 aus Holz oder anderen Werkstoffen, von welchen ersteren sowohl den Kopfober- wie den Kopfunterteil formt, während der Kern 13 dem Rohrende die erforderliche Aufweitung gibt.The tube i with the lower head part is also formed into a shape g brought that flared at its lower end io and conically at its upper end is formed into a plate i i corresponding to the shape of the head. The shaping of all Parts are then made with the help of cores 12 and 13 made of wood or other materials, of which the former forms both the top and bottom part of the head, while the Core 13 gives the pipe end the required expansion.

Nach Herstellung der Form werden die überstehenden Ränder des Kopfober- und Unterteiles abgeschnitten, so daß bei beiden Teilen glatte Ringflächen entstehen, die mit Gummilösung bestrichen und dann nach Entfernung der Kerne gemäß Fig.6 in ihren Formteilen fest zusammengefügt werden. Das untere Schlauchende wird durch einen Gummistopfen verschlossen und das Ganze nunmehr in der Form mit Heißdampf oder warmer Luft von etwa i4o° vulkanisiert, wobei in bekannter Weise ein Vulkanisationsbeschleuniger verwendet werden kann. Um hierbei den Gummi an die Formwandungen zu pressen, wird in das Innere des Schlauches ein Treibmittel eingeführt.After the mold is made, the protruding edges of the top of the head are and lower part cut off, so that smooth annular surfaces are created in both parts, which are coated with rubber solution and then after removing the cores according to Fig. 6 in their molded parts are firmly joined together. The lower end of the hose is through closed a rubber stopper and the whole thing now in the form with superheated steam or warm air of about 14o ° vulcanized, with a vulcanization accelerator in a known manner can be used. In order to press the rubber against the mold walls, is a propellant introduced into the interior of the hose.

Nach der Vulkanisation werden die Formstücke abgenommen, der längs der Verbindungsnaht bestehende feine Rand abgeschliffen und die Öffnungen 14 im Katheterkopf angebracht. Das so fertiggestellte Katheter ist in Fig. 7 teils im Längsschnitt, teils in Seitenansicht, in Fig. 8 in einer Stirnansicht der Kopfseite dargestellt.After vulcanization, the fittings are removed, the lengthways the connection seam existing fine edge sanded and the openings 14 in the Catheter head attached. The catheter finished in this way is partly shown in FIG Longitudinal section, partly in side view, in FIG. 8 in an end view of the head side shown.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zum Herstellen von Pezzerkathetern aus Weichkautschuk, bei welchem der äußere Teil des erweiterten Kopfes durch eine ringförmige Quernaht mit dem Kopfunterteil verbunden wird, dadurch gekennzeichnet, daß der aus einer flachen,- gelochten Kautschukscheibe (3) bestehende Kopfunterteil über das abgefaste Schlauchende gezogen und mit dessen nach außen umgebördeltem Rande (5) verklebt und sodann mit dem gleichfalls aus einer Kautschukscheibe (6) gebildeten Kopfoberteil in Formen reit einem Kern (12) gepreßt wird, worauf nach Abschneiden des Formgrates sowie Entfernen des Kernes die beiden Teile zusammengeklebt und vulkanisiert werden. PATENT CLAIMS: i. Method for manufacturing Pezzer catheters Soft rubber, in which the outer part of the enlarged head by an annular Cross seam is connected to the lower head part, characterized in that the a flat, perforated rubber washer (3) over the existing head base beveled hose end pulled and with its edge beaded outwards (5) glued and then also formed from a rubber disk (6) Head top part in forms rides a core (12) is pressed, whereupon after cutting off of the molding and removing the core, the two parts are glued together and vulcanized will. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß beim Formen des Kopfoberteiles ein auf einer Seite geschlossenes Schlauch- oder Plattenstück (8) als Spitzenverstärkung eingeklebt und mit verformt wird.2. The method according to claim i, characterized in that when forming the Top part of a tube or plate closed on one side (8) is glued in as a tip reinforcement and deformed with it.
DER94814D 1935-11-27 1935-11-27 Method of making Pezzer catheters Expired DE660774C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DER94814D DE660774C (en) 1935-11-27 1935-11-27 Method of making Pezzer catheters
FR799593D FR799593A (en) 1935-11-27 1935-12-19 Method for manufacturing four-fin or two-fin probes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER94814D DE660774C (en) 1935-11-27 1935-11-27 Method of making Pezzer catheters

Publications (1)

Publication Number Publication Date
DE660774C true DE660774C (en) 1938-06-02

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DER94814D Expired DE660774C (en) 1935-11-27 1935-11-27 Method of making Pezzer catheters

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019216254A1 (en) * 2019-10-22 2021-04-22 Raumedic Ag catheter
WO2021078526A1 (en) 2019-10-22 2021-04-29 Raumedic Ag Catheter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019216254A1 (en) * 2019-10-22 2021-04-22 Raumedic Ag catheter
WO2021078526A1 (en) 2019-10-22 2021-04-29 Raumedic Ag Catheter

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FR799593A (en) 1936-06-15

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