WO1998010256A1 - Verfahren zur herstellung einer einweg-schutzkappe für ein infrarot-strahlungsthermometer - Google Patents
Verfahren zur herstellung einer einweg-schutzkappe für ein infrarot-strahlungsthermometer Download PDFInfo
- Publication number
- WO1998010256A1 WO1998010256A1 PCT/EP1997/004319 EP9704319W WO9810256A1 WO 1998010256 A1 WO1998010256 A1 WO 1998010256A1 EP 9704319 W EP9704319 W EP 9704319W WO 9810256 A1 WO9810256 A1 WO 9810256A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wall thickness
- window
- protective cap
- thickness
- cup
- Prior art date
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 239000000523 sample Substances 0.000 claims abstract description 4
- 230000005855 radiation Effects 0.000 claims description 35
- -1 polyethylene Polymers 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 210000000613 ear canal Anatomy 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 238000001746 injection moulding Methods 0.000 claims description 5
- 238000003754 machining Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 23
- 238000004026 adhesive bonding Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 13
- 238000009529 body temperature measurement Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 210000000959 ear middle Anatomy 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 210000003454 tympanic membrane Anatomy 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/05—Means for preventing contamination of the components of the optical system; Means for preventing obstruction of the radiation path
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/021—Probe covers for thermometers, e.g. tympanic thermometers; Containers for probe covers; Disposable probes
Definitions
- the present invention relates to a method for producing a disposable protective cap for an infrared radiation thermometer which can be inserted into a body cavity, in particular for an ear canal temperature measuring probe, the protective cap, one end of which is open and the opposite end of which has a window which is transparent to infrared radiation, is made of plastic.
- Infrared radiation thermometers are widely used for body temperature measurement in people.
- a radiation thermometer has a housing with a radiation entrance window, internal optics and an infrared sensor, which is assigned to an evaluation unit.
- the radiation entrance window closes the interior of the housing of the radiation thermometer in order to protect the optics and the sensor from contamination and destruction.
- disposable protective caps of the type mentioned are placed on the end of the thermometer, which on the one hand serve to protect the window when the thermometer is stored, and on the other hand are changed for hygienic reasons if different people use such a thermometer.
- the disposable speculum as it is referred to in this document, is pushed over the ear canal probe of a middle ear thermometer sensitive to infrared radiation.
- This disposable speculum has a membrane that is permeable to infrared radiation and is made of polypropylene or polyethylene.
- the base body, which supports the membrane, is an injection-molded part, at the edge area, which delimits the window opening, the transparent membrane, produced as a thin film, is thermally bonded.
- FIG. 1 Another protective cap for a thermometer that can be inserted into an ear canal is described in US Pat. No. 5,293,862.
- a tubular base body is first molded by injection molding, and a membrane is attached to one open end.
- a casting mold is provided which has a cavity corresponding to the base body.
- the casting mold can be divided so that a window film can be inserted into this parting plane before each spraying process.
- An annular web is injection molded onto the outside of the window film, which extends in the extension of the wall of the base body, so that the window film is held between the base body and this outer ring after the spraying process.
- the present invention is based on the object of specifying a method with which such disposable protective caps can be produced in a cost-effective manner, and in particular one Influencing the materials, ie avoids the material of the base body and the material from which the window film is produced by the action of heat or any adhesives which are used to fasten the window film to the base body.
- the protective cap is produced in one piece. Only after the one-piece, cup-shaped preform has been formed is the window reduced to its predetermined thickness. Because of the one-piece design of the disposable protective cap, ie the seamless design of the actual one Carrier with the seamlessly molded window that is permeable to infrared radiation, tensions or other influences that are caused or could be caused by a separate attachment of a window film to the molded body by gluing or connecting with the application of heat are avoided.
- a preform is formed which has a wall thickness between 0.1 mm and 1 mm, whereupon in a second step the bottom region of the cup-shaped preform to form the window which transmits the infrared radiation to a thickness of 0.05 mm is reduced to 0.005 mm.
- Various methods are available for reducing the wall thickness of the base area of the cup-shaped pre-body. This reduction in thickness is preferably carried out mechanically, according to claim 3, on the outer surface. Particularly good results can be achieved using a microtome knife.
- the preform can be suitably clamped, so that in particular the inside of the bottom area of the cup-shaped preform is adequately protected.
- the bottom i.e. on the outside of the cup-shaped pre-body, the bottom area is reduced to the required thickness using a microtome knife (claim 5).
- microtome knives are well known from microscopy, where they are used to create thin sections of the materials and objects to be examined.
- a microtome knife in the form of a micro slicer can be used in a correspondingly constructed device.
- the cup-shaped pre-body as described above, is placed on a support body, possibly sucked onto the underlying support body at least in the region of the window to be formed, and is then thinned on the outside with the microtome plane (claim 6). With such a procedure, very reproducible results can be achieved.
- a temperature is preferably chosen which is below the room temperature, so that the material is stabilized when the cutting thickness reduction is carried out due to the reduced temperature.
- the suitable temperature range is according to claim 5 in the range from 25 ° C to -195 ° C.
- a plastic plate or a plastic film can be used as the starting material, from which the preform is deep-drawn.
- the preform is formed by injection molding plastic into a model shape corresponding to the cup-shaped preform to be produced.
- the cup-shaped pre-body can be made of different materials, for example, by choosing a different material for the cup base, which later forms the window that transmits infrared radiation, than for the cup wall.
- a protective cap can be formed, the materials of which are optimally adapted to the requirements in the respective areas. For example, it is also possible in this way to build up the cup wall from soft material, for example from foamed materials.
- Such Protective cap which is placed on the measuring tip of a thermometer, lies softly against the ear canal when the clinical thermometer is inserted.
- Fig. 1 shows schematically a cup-shaped pre-body in section along the axis with an indicated microtome knife, which thins the window area by cutting, and
- Fig. 2 is a section corresponding to Figure 1 of a finished protective cap with a profiled wall to improve comfort in the ear canal of the user of a thermometer, on which such a protective cap is placed.
- a disposable protective cap 1 as shown in section in FIG. 2, has a tubular or sleeve-shaped base body 2, the upper, free end 3 of which is closed with an infrared window 4, which consists of a thin, for infrared radiation permeable film is formed.
- an annular bead 5 projecting radially outward to the axis, designated by the reference number 6, is attached.
- Such a disposable protective cap 1 is placed on the measuring end of an infrared radiation thermometer, not shown, so that the thermometer tip is accommodated in the interior 7 of the disposable protective cap 1.
- the clinical thermometer with the attached protective cap 1 is then inserted into a user's ear canal.
- Infrared radiation emitted by the eardrum and the ear canal enters the measuring end of the radiation thermometer via window 4 and is guided in the radiation thermometer to an infrared sensor.
- the temperature increase caused in the infrared sensor results in an electrical output voltage from which the radiation temperature is derived.
- the protective cap 1 is a disposable part which is removed from the radiation thermometer after a temperature measurement has been carried out, in order then to put on a new, unused protective cap 1 for a new temperature measurement, for example for another person.
- the protective cap 1 is used as a disposable part, inexpensive production is essential, but taking into account that the window 4 which transmits the infrared radiation to the infrared sensor of the respective radiation thermometer has suitable properties, i.e. on the one hand is sufficiently thin and on the other hand runs smoothly stretched on the upper, free ends 3 of the sleeve-shaped molded body 2.
- the protective cap 1 is preferably formed from a cup-shaped pre-body 8. Such a preform, as shown schematically in section in FIG. 1, has a contour that roughly corresponds to the final shape of the protective cap 1.
- the preform 8 can be formed, for example, by deep drawing or by injection molding a suitable plastic material. Polyethylene or polypropylene is preferably used for the plastic material if the entire preform 8 is to be produced from a uniform material. Polyethylene and polypropylene are particularly suitable for the window 4, since they let the corresponding radiation components pass through in the relevant measuring range that is used for the body temperature measurement. If the base body 2 of the finished protective cap 1 is to consist of a different material, for example a softer material, such as foam, the initial shape, i.e. the preform 8 can be built using a suitable choice of material in the specific areas.
- the pre-body 8 is placed on a support core, designated by the reference number 9 in FIG. 1, so that the bottom 10 of the cup-shaped pre-body 8 is supported on the inside on the support core 9.
- the support core 9 can have a vacuum device, not shown, so that the base 10 of the cup-shaped pre-body 8 is sucked onto the support core 9.
- the base 10 of the preform 8 is then thinned with a microtome knife 11 by removing one or more layers 12 from the base 10 in one or more planing operations be removed until the bottom 10 has a suitable thickness, preferably about 0.005 mm to 0.05 mm, while the preform 8 in the area of the bottom 10 had a wall thickness of about 0.10 mm to 1 mm before the thickness was reduced.
- the reduction in thickness of the base 10 can be assisted by the application of laser radiation or, in the case of several processing operations in order to reduce the thickness of the base 10, a first reduction in thickness can be carried out by removal by means of laser radiation, preferably by means of excimer laser radiation, whereas the last processing operation is carried out by means of the microtome knife 11.
- the preform 8 is at a low temperature, i.e. when processing with the microtome knife 11. is kept at a temperature below room temperature in order to stabilize the material during the cutting process due to the cooling of the material of the pre-body 8.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51215898A JP2001520536A (ja) | 1996-09-05 | 1997-08-08 | 赤外線温度計用の使い捨て保護カバーの製造方法 |
AU43792/97A AU4379297A (en) | 1996-09-05 | 1997-08-08 | Method for making a one-way protective cover for an infrared thermometre |
EP97941923A EP0923714A1 (de) | 1996-09-05 | 1997-08-08 | Verfahren zur herstellung einer einweg-schutzkappe für ein infrarot-strahlungsthermometer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19635984A DE19635984A1 (de) | 1996-09-05 | 1996-09-05 | Verfahren zur Herstellung einer Einweg-Schutzkappe für ein Infrarot-Strahlungsthermometer |
DE19635984.8 | 1996-09-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998010256A1 true WO1998010256A1 (de) | 1998-03-12 |
WO1998010256A9 WO1998010256A9 (de) | 2001-02-01 |
Family
ID=7804670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/004319 WO1998010256A1 (de) | 1996-09-05 | 1997-08-08 | Verfahren zur herstellung einer einweg-schutzkappe für ein infrarot-strahlungsthermometer |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0923714A1 (de) |
JP (1) | JP2001520536A (de) |
AU (1) | AU4379297A (de) |
DE (1) | DE19635984A1 (de) |
TW (1) | TW393571B (de) |
WO (1) | WO1998010256A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001137195A (ja) * | 1999-11-15 | 2001-05-22 | A & D Co Ltd | 体温計 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6554919B2 (ja) * | 2015-02-25 | 2019-08-07 | 中西金属工業株式会社 | センサホルダ部を有する保護カバーの製造方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0201790A2 (de) * | 1985-05-08 | 1986-11-20 | Intelligent Medical Systems, Inc. | Wegwerf-Spekulum |
EP0472490A1 (de) * | 1990-08-24 | 1992-02-26 | Thermoscan Inc. | Einteilige Sondenabdeckung |
-
1996
- 1996-09-05 DE DE19635984A patent/DE19635984A1/de not_active Ceased
-
1997
- 1997-08-08 WO PCT/EP1997/004319 patent/WO1998010256A1/de not_active Application Discontinuation
- 1997-08-08 JP JP51215898A patent/JP2001520536A/ja active Pending
- 1997-08-08 AU AU43792/97A patent/AU4379297A/en not_active Abandoned
- 1997-08-08 EP EP97941923A patent/EP0923714A1/de not_active Withdrawn
- 1997-08-21 TW TW086112028A patent/TW393571B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0201790A2 (de) * | 1985-05-08 | 1986-11-20 | Intelligent Medical Systems, Inc. | Wegwerf-Spekulum |
EP0472490A1 (de) * | 1990-08-24 | 1992-02-26 | Thermoscan Inc. | Einteilige Sondenabdeckung |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001137195A (ja) * | 1999-11-15 | 2001-05-22 | A & D Co Ltd | 体温計 |
Also Published As
Publication number | Publication date |
---|---|
AU4379297A (en) | 1998-03-26 |
JP2001520536A (ja) | 2001-10-30 |
WO1998010256A9 (de) | 2001-02-01 |
DE19635984A1 (de) | 1998-03-12 |
EP0923714A1 (de) | 1999-06-23 |
TW393571B (en) | 2000-06-11 |
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