EP0493436A1 - An automatic parking coupon. - Google Patents

An automatic parking coupon.

Info

Publication number
EP0493436A1
EP0493436A1 EP90913775A EP90913775A EP0493436A1 EP 0493436 A1 EP0493436 A1 EP 0493436A1 EP 90913775 A EP90913775 A EP 90913775A EP 90913775 A EP90913775 A EP 90913775A EP 0493436 A1 EP0493436 A1 EP 0493436A1
Authority
EP
European Patent Office
Prior art keywords
timer
film
wick
porous wick
liquid
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.)
Granted
Application number
EP90913775A
Other languages
German (de)
French (fr)
Other versions
EP0493436B1 (en
EP0493436A4 (en
Inventor
Thomas Webb Tothill
Harry George Cockburn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TIME TICKET INTERNATIONAL Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0493436A1 publication Critical patent/EP0493436A1/en
Publication of EP0493436A4 publication Critical patent/EP0493436A4/en
Application granted granted Critical
Publication of EP0493436B1 publication Critical patent/EP0493436B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
    • G04F1/04—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity
    • G04F1/06—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers by movement or acceleration due to gravity by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F13/00—Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F13/00—Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00
    • G04F13/06—Apparatus for measuring unknown time intervals by means not provided for in groups G04F5/00 - G04F10/00 using fluidic means
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
    • G07C1/30—Parking meters

Definitions

  • the present invention relates to a timer for visibly indicating elapsed time and more particularly to a timer for visibly indicating elapsed time in such a manner that, once the timer has been started, it cannot be reset, slowed or otherwise tampered with.
  • the timer according to the invention is capable of a wide variety of different applications, but is particularly useful as a substitute for existing parking meters.
  • a number of prior proposals have been made for substitute parking meters.
  • One example being a timer comprising a case containing a piece of porous sheet material and a reservoir of liquid arranged so that when the liquid reservoir is opened liquid soaks into the paper.
  • the liquid and/or paper being coloured or impregnated with a dye so that the passage of the liquid up or down the paper leaves a visible trace.
  • the device functions as a timer because the rate of progress of the liquid up or down the paper is dependent upon time.
  • a timer comprising a lamination containing a piece of porous wick material, and a reservoir of liquid, said liquid and/or said porous wick being such that when the reservoir is opened and the liquid released it soaks into the porous wick to thereby create a visible trace of the liquid on or in the porous wick; a face part of the lamination being transparent such that said visible trace can be seen; said wick material having imposed thereon or positioned adjacent thereto a series of markings which cover the time range over which the timer is to be used.
  • the porous wick is paper or a substrate at least partially coated with a porous plastics material (e.g. methylhydr ⁇ xyethyulcellulose) or plaster of paris.
  • a porous plastics material e.g. methylhydr ⁇ xyethyulcellulose
  • plaster of paris e.g. methylhydr ⁇ xyethyulcellulose
  • the porous wick is encased in a layer of impervious material for example a polypropylene or polyester film.
  • a layer of impervious material for example a polypropylene or polyester film.
  • Across the bottom section of one of the laminated films is an opening through the film and above this is a band of aluminium foil or a line of hot melt adhesive which is bonded to the film.
  • the lamination has attached to the back thereof a third laminate which is sealed around its edges thus forming a cavity between the laminates. This cavity has sealed therein a volume of fluid.
  • the paper wick is preferably pre-coated on the back side with a solution consisting of a viscosity correction agent and a dye. Operation of the preferred timer device is described below. Further aspect of the invention which should be considered in all its novel aspect will become apparent from the following description.
  • Figure 1 shows a front view of a preferred example of timer ticket
  • Figure 2 shows a rear view of the ticket shown in Figure 1;
  • Figure 3 shows a section on the lines A-A through the ticket shown in Figure 1;
  • Figure 4 shows a section on the lines B-B through the ticket shown in Figure 1.
  • timer device will be described with reference to the production of a parking meter coupon and it is to be appreciated that the same technology can be utilised in other situations.
  • the coupon consists of a porous paper wick 1 encased in layers of impervious film material, front and back 2 and 3 respectively.
  • This covering film material can be a hot melt glue coated or co-extruded polyester film.
  • the layers of film 2 and 3 are laminated together around their periphery. Across the bottom section of the film 3 there is an opening through the centre film and above this is a band of aluminium foil, polyester strip or hot melt trace 4 which is bonded by a hot melt glue to the centre film 3 on the wick side.
  • a third film 5 Attached to the back of the centre film 3 is a third film 5 that is sealed around its edges thus forming a cavity between the laminated films 3 and 5. Within this cavity is sealed a volume of fluid 6.
  • the paper wick element 1 is pre-coated on its back surface facing film 3 with a solution consisting of a viscosity correction agent and a dye.
  • a solution consisting of a viscosity correction agent and a dye.
  • the specification for the materials that have been found in the applicant's trials and experiments to be most suitable are; a) Front film 2 - clear co-extruded or hot melt adhesive coated polyester film of 12 micron thickness .
  • Middle film 3 - aluminium metallized polyester film or co-laminated aluminium foil between polypropylene or polyethylene films to provide necessary water vapour impermeability and high bond strength.
  • the viscosity correction agent used on the surface of the element 1 or wick is material such as an aqueous solution of high molecular weight fraction ° gelatine with coloured dye such as rhodamine impregnated part way into the thickness of the paper wick, d) Aluminium foil 4 - standard commercial 15 micron aluminium foil, with a lacquer coating or hot melt glue coating to prevent water vapour transmission through any pin holes. e) Fluid 6 an aqueous solution of calcium chloride and potassium chloride to give the required freezing point depression, viscosity correction agent solubility and hindered gelling properties. f) Back film 5 - aluminium metallized polyester film of 25 micron thickness or similar vapour barrier film to provide necessary water vapour impermeability. The ticket when laminated together is activated by rupturing, pulling, puncturing or positively breaking a seal which is ruptured by movement associated with the generally flexible timer.
  • This rupturing allows the fluid 6 to flow through the slit or holes in the film.
  • VGA viscosity correcting agent
  • VCA viscosity variation of the fluid
  • the elapsed time is indicated by the fluid front passing a height indication nark that is printed on the film, ticket or paper wick 2.
  • the fluid will continue on past the height mark and hence gives an indication of the time passed the expiry time or in this case ' ime over parked' .
  • the top flap of the ticket is designed to be folded over a car window and hung on the drivers side window.
  • a method of manufacturing the ticket requires the blotting paper to be coated with the VCA and dye solution, using a direct reverse roller coating printing operation or similar.
  • the paper may be heated to 160-170 * C for a controlled time to modify the VCA's soluability to that required to give a constant viscosity of the fluid as it travels up the paper. This modification is similar to that used in the photographic industry for the hardening of gelatine used in films.
  • the paper wick elements can be cut from a roll of treated paper, then positioned on the film 3.
  • the film 3 is heated to make the adhesive coating slightly tacky, then the wicks are positioned on the film. This film is then passed between heated rollers or over a heated plate where the top film 2 is laminated to the centre film.
  • the lamination passes through cold soft rubber rollers to 'set' the adhesive.
  • the forming of the back pouch on the ticket, lamination and filling with the fluid, is an adaption of standard liquid sachet forming equipment.
  • the preferred version above has been designed to produce particular elapsed times and it is envisaged that by minor modifications and variations the ticket can be designed to provide for differing elapsed times to suit particular users requirements.

Abstract

A timer comprising a lamination containing a piece of porous wick material (1), and a reservoir of liquid (6), said liquid (6) and/or said porous wick (1) being such that when the reservoir is opened and the liquid (6) released it soaks into the porous wick (1) to thereby create a visible trace of the liquid on or in the porous wick; a face part (2) of the lamination being transparent such that said visible trace can be seen; said wick material (1) having imposed thereon or positioned adjacent thereto a series of markings which cover the time range over which the timer is to be used. The invention also provides a method of manufacturing the timer.

Description

"AN AUTOMATIC PARKING COUPON"
The present invention relates to a timer for visibly indicating elapsed time and more particularly to a timer for visibly indicating elapsed time in such a manner that, once the timer has been started, it cannot be reset, slowed or otherwise tampered with. The timer according to the invention is capable of a wide variety of different applications, but is particularly useful as a substitute for existing parking meters.
A number of prior proposals have been made for substitute parking meters. One example being a timer comprising a case containing a piece of porous sheet material and a reservoir of liquid arranged so that when the liquid reservoir is opened liquid soaks into the paper. The liquid and/or paper being coloured or impregnated with a dye so that the passage of the liquid up or down the paper leaves a visible trace. The device functions as a timer because the rate of progress of the liquid up or down the paper is dependent upon time.
None of the existing proposals appear to have dealt successfully with inherent difficulties imposed on such a timer by temperature fluctuations. The rate of movement of the liquid up or down the porous sheet material depends on the viscosity of the liquid and the viscosity of the majority of liquids is normally temperature dependent. A number of proposals have been made to overcome this problem but none seem to have been entirely successful.
It is therefore an object of the present invention to provide a device of the above general type which obviates the above identified disadvantages and accurately compensates for viscosity fluctuations due to changes in temperature while not unduly increasing the complexity or cost of the timer device. According to a first aspect of the present invention there is provided a timer comprising a lamination containing a piece of porous wick material, and a reservoir of liquid, said liquid and/or said porous wick being such that when the reservoir is opened and the liquid released it soaks into the porous wick to thereby create a visible trace of the liquid on or in the porous wick; a face part of the lamination being transparent such that said visible trace can be seen; said wick material having imposed thereon or positioned adjacent thereto a series of markings which cover the time range over which the timer is to be used.
According to a second aspect of the invention there is provided a method of manufacturing the timer according to the first aspect of the invention.
Preferably the porous wick is paper or a substrate at least partially coated with a porous plastics material (e.g. methylhydrσxyethyulcellulose) or plaster of paris.
Preferably the porous wick is encased in a layer of impervious material for example a polypropylene or polyester film. Across the bottom section of one of the laminated films is an opening through the film and above this is a band of aluminium foil or a line of hot melt adhesive which is bonded to the film. The lamination has attached to the back thereof a third laminate which is sealed around its edges thus forming a cavity between the laminates. This cavity has sealed therein a volume of fluid. The paper wick is preferably pre-coated on the back side with a solution consisting of a viscosity correction agent and a dye. Operation of the preferred timer device is described below. Further aspect of the invention which should be considered in all its novel aspect will become apparent from the following description.
The present invention will now be described with reference to the accompanying drawings in which: Figure 1 shows a front view of a preferred example of timer ticket;
Figure 2 shows a rear view of the ticket shown in Figure 1;
Figure 3 shows a section on the lines A-A through the ticket shown in Figure 1; and;
Figure 4 shows a section on the lines B-B through the ticket shown in Figure 1.
The following example of the timer device will be described with reference to the production of a parking meter coupon and it is to be appreciated that the same technology can be utilised in other situations.
The coupon consists of a porous paper wick 1 encased in layers of impervious film material, front and back 2 and 3 respectively. This covering film material can be a hot melt glue coated or co-extruded polyester film. The layers of film 2 and 3 are laminated together around their periphery. Across the bottom section of the film 3 there is an opening through the centre film and above this is a band of aluminium foil, polyester strip or hot melt trace 4 which is bonded by a hot melt glue to the centre film 3 on the wick side.
Attached to the back of the centre film 3 is a third film 5 that is sealed around its edges thus forming a cavity between the laminated films 3 and 5. Within this cavity is sealed a volume of fluid 6.
The paper wick element 1 is pre-coated on its back surface facing film 3 with a solution consisting of a viscosity correction agent and a dye. The specification for the materials that have been found in the applicant's trials and experiments to be most suitable are; a) Front film 2 - clear co-extruded or hot melt adhesive coated polyester film of 12 micron thickness . b) Middle film 3 - aluminium metallized polyester film or co-laminated aluminium foil between polypropylene or polyethylene films to provide necessary water vapour impermeability and high bond strength. c) Paper wick element 1 for times of _ hour, 1 hour and 2 hour duration paper of lSOg/uij comprising 80% hardwood and 20% softwood pulp, with no filler, no sizing or other additives but with a density of 500 to 550Kg/ m ; and for times above 2 hours to about 8 hours paper of 160g/m2 comprising 100% softwood pulp with a density of 700 Kg/m . The viscosity correction agent used on the surface of the element 1 or wick is material such as an aqueous solution of high molecular weight fraction ° gelatine with coloured dye such as rhodamine impregnated part way into the thickness of the paper wick, d) Aluminium foil 4 - standard commercial 15 micron aluminium foil, with a lacquer coating or hot melt glue coating to prevent water vapour transmission through any pin holes. e) Fluid 6 an aqueous solution of calcium chloride and potassium chloride to give the required freezing point depression, viscosity correction agent solubility and hindered gelling properties. f) Back film 5 - aluminium metallized polyester film of 25 micron thickness or similar vapour barrier film to provide necessary water vapour impermeability. The ticket when laminated together is activated by rupturing, pulling, puncturing or positively breaking a seal which is ruptured by movement associated with the generally flexible timer.
This rupturing allows the fluid 6 to flow through the slit or holes in the film.
As the fluid 6 is drawn up the paper wick 1 by capillary action the dye is drawn to the front of the paper, thus indicating the fluid height up the wick.
The solubility of the viscosity correcting agent (VGA) is dependent on the fluid temperature, such that at differing temperatures, or over changing temperatures, the viscosity of the fluid and dissolved VCA remains relatively constant.
As the main variable affecting the rate that the fluid front progresses up the paper wick, is viscosity variation of the fluid, with temperature, thus dissolving of the VCA provides a rate of fluid migration up the paper wick that is comparatively unaffected by temperature variations from environmental conditions. The elapsed time is indicated by the fluid front passing a height indication nark that is printed on the film, ticket or paper wick 2. The fluid will continue on past the height mark and hence gives an indication of the time passed the expiry time or in this case ' ime over parked' .
The top flap of the ticket is designed to be folded over a car window and hung on the drivers side window. A method of manufacturing the ticket requires the blotting paper to be coated with the VCA and dye solution, using a direct reverse roller coating printing operation or similar. Optionally the paper may be heated to 160-170*C for a controlled time to modify the VCA's soluability to that required to give a constant viscosity of the fluid as it travels up the paper. This modification is similar to that used in the photographic industry for the hardening of gelatine used in films. The paper wick elements can be cut from a roll of treated paper, then positioned on the film 3.
To achieve this the film 3 is heated to make the adhesive coating slightly tacky, then the wicks are positioned on the film. This film is then passed between heated rollers or over a heated plate where the top film 2 is laminated to the centre film.
The use of heat activated adhesives on both films and soft rubber heated rollers, means that the molten glue is pushed into all the gaps around the paper wick. The option is to use an aluminium foil, polyester strip or hot melt trace as a weir.
Directly after the heater rollers the lamination passes through cold soft rubber rollers to 'set' the adhesive. The forming of the back pouch on the ticket, lamination and filling with the fluid, is an adaption of standard liquid sachet forming equipment.
One aspect not discussed in the above description is the incorporation of an air cavity in the upper portion of the paper wick 1. This cavity is necessary to provide accurate time measurement in the upper half of the wick.
The preferred version above has been designed to produce particular elapsed times and it is envisaged that by minor modifications and variations the ticket can be designed to provide for differing elapsed times to suit particular users requirements.
A particular example of the invention has been described herein by way of example and it is envisaged that improvements and modifications can take place without departing from the scope of the appended claims.

Claims

Claims :
1. A timer comprising a lamination containing a piece of porous wick material, and a reservoir of liquid, said liquid and/or said porous wick being such that when the reservoir is opened and the liquid released it soaks into the porous wick to thereby create a visible trace of the liquid on or in the porous wick; a face part of the lamination being transparent such that said visible trace can be seen; said wick material having imposed thereon or positioned adjacent thereto a series of markings which cover the time range over which the timer is to be used.
2. A timer as claimed in claim 1 wherein the porous wick is encased in layer of impervious material such as a polypropylene or polyester film.
3. A timer as claimed in claim 1 or claim 2 wherein across the bottom section of the centre lamination film is an opening through the film and above this is a band of hot melt adhesive which is bonded to the wick and to the film.
4. A timer as claimed in any one of the preceding claims wherein the lamination has attached to the back thereof a third film laminate which is sealed around its edges thus forming a cavity between the laminates.
5. A timer as claimed in claim 4 wherein the cavity has sealed therein a volume of fluid.
6. A timer as claimed in any one of the preceding claims wherein the porous wick is pre-coated on the back side with a solution consisting of a viscosity correction agent and a dye.
7. A timer as claimed in any one of the preceding claims wherein the film is hot melt glue coated or co-extruded.
8. A timer as claimed in claim 7 wherein the film is a clear film of substantially 12 micron thickness.
9. A timer as claimed in any one of the preceding claims wherein the centre film can be a composite laminate film to provide the necessary bond or seal strength and water vapour impermeability.
10. A timer as claimed in any one of the preceding claims wherein the porous wick element for times of i hour, 1 hour 0 and 2 hour duration is paper of about 150g/m2 comprising about 80% hardwood and about 20% softwood pulp, with no filler, no sizing or other additives but having a density of approximately 500 to 550Kg/m .
11. A timer as claimed in any one of claims 1 to 9 wherein 5 the porous wick element for times of above 2 hours to about 8 hours is paper of about 160g/n comprising 100% softwood pulp
3 having a density of about 700Kg/m or greater.
12. A timer as claimed in any one of the preceding claims wherein a viscosity correction or compensating agent used on o the surface of the element is an aqueous solution of gelatine with a dye impregnated part way into the thickness of the porous wick.
13. A timer as claimed in any one of the preceding claims wherein the aluminium foil is a standard commercial 15 micron aluminium foil, with a lacquer coating or hot melt glue coating to prevent water vapour transmission through any pin holes.
14. A timer as claimed in any one of the preceding claims wherein the fluid gives the required freezing point depression, the viscosity correction agent solubility and hindered gelling properties such as calcium chloride or potassium chloride.
15. A timer as claimed in any one of the preceding claims wherein the rear film is an aluminium metallized polyester film of about 25 micron thickness or a similar vapour barrier film to provide water vapour impermeability.
16. A timer substantially as hereinbefore described with reference to the drawings.
17. A method of manufacturing a timer according to any one of the preceding claims.
18. A method as claimed in claim 17 wherein the manufacturing of the ticket requires the paper or wick material to be coated with the viscocity correction agent and dye solution, using a direct reverse roller coating printing operation or similar.
19. A method as claimed in claim 17 or claim 18 wherein optionally the gelatine is modified by cross-linking agentsor methods as known in the photographic industry such as heating to 160-170*C, high humidity, ultraviolet radiation agents, or chemical cross-linking agents.
20. A method of manufacturing a timer substantially as hereinbefore described with reference to the accompanying drawings.
EP90913775A 1989-09-20 1990-09-20 An automatic parking coupon Expired - Lifetime EP0493436B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ230716 1989-09-20
NZ230716A NZ230716A (en) 1989-09-20 1989-09-20 Timer ticket with visibly indicating elapsed time: porous wick permeated by released liquid
PCT/AU1990/000433 WO1991004520A1 (en) 1989-09-20 1990-09-20 An automatic parking coupon

Publications (3)

Publication Number Publication Date
EP0493436A1 true EP0493436A1 (en) 1992-07-08
EP0493436A4 EP0493436A4 (en) 1993-03-17
EP0493436B1 EP0493436B1 (en) 1995-12-27

Family

ID=19922970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90913775A Expired - Lifetime EP0493436B1 (en) 1989-09-20 1990-09-20 An automatic parking coupon

Country Status (13)

Country Link
EP (1) EP0493436B1 (en)
JP (1) JPH05500713A (en)
KR (1) KR920704202A (en)
CN (1) CN1028259C (en)
AT (1) ATE132283T1 (en)
AU (1) AU649413B2 (en)
BR (1) BR9007670A (en)
CA (1) CA2066603A1 (en)
DE (1) DE69024497D1 (en)
IE (1) IE903393A1 (en)
NZ (1) NZ230716A (en)
WO (1) WO1991004520A1 (en)
ZA (1) ZA907503B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580580B1 (en) * 1991-06-27 1996-10-23 HAAS, David, J. Patterned indicators
DE4205400A1 (en) * 1992-02-20 1993-08-26 Markus Barainsky CONSUMABLE ITEM
US5602804A (en) * 1995-08-03 1997-02-11 Temtec Inc Long term rapid color changing time indicator
FR2795533A1 (en) 1999-06-22 2000-12-29 Science Et Tec Method for measuring fixed period of time for vehicle parking purposes by using non-miscible liquids that after initial shaking separates after set time period
GB0718816D0 (en) * 2007-09-26 2007-11-07 Intray Ltd Time indicator device
CA2834221C (en) 2011-04-29 2015-12-22 Colgate-Palmolive Company Oral care implement having visual indicator of depletion of a fluid
EP3014300A4 (en) * 2013-06-28 2017-03-01 Jp Laboratories, Inc. Time indicating devices based on counterbalancing reactions
KR101785068B1 (en) * 2017-05-31 2017-10-12 이남희 Time indicator

Citations (5)

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Publication number Priority date Publication date Assignee Title
US4212153A (en) * 1978-02-07 1980-07-15 Herculite Protective Fabrics Corporation Time color indicator
JPS60151578A (en) * 1984-01-18 1985-08-09 Toppan Printing Co Ltd Display body for elapsed time
JPS60237387A (en) * 1984-05-10 1985-11-26 Hidehiko Tanaka Display for passage of time
JPS61176879A (en) * 1985-02-01 1986-08-08 Toppan Printing Co Ltd Time lapse indicator
US4903254A (en) * 1989-08-31 1990-02-20 Haas David J Time indicator enhancement method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3520124A (en) * 1969-02-13 1970-07-14 Sumner Myers Timer device
US3954011A (en) * 1973-09-24 1976-05-04 Minnesota Mining And Manufacturing Company Selected time interval indicating device
US4229813A (en) * 1978-06-26 1980-10-21 Akzona Incorporated Elapsed time indicator
DE3717025C1 (en) * 1987-05-21 1988-08-11 Werner Dipl-Ing Weck Display device for time-dependent processes and method of starting this device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4212153A (en) * 1978-02-07 1980-07-15 Herculite Protective Fabrics Corporation Time color indicator
JPS60151578A (en) * 1984-01-18 1985-08-09 Toppan Printing Co Ltd Display body for elapsed time
JPS60237387A (en) * 1984-05-10 1985-11-26 Hidehiko Tanaka Display for passage of time
JPS61176879A (en) * 1985-02-01 1986-08-08 Toppan Printing Co Ltd Time lapse indicator
US4903254A (en) * 1989-08-31 1990-02-20 Haas David J Time indicator enhancement method

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 106 (P-449)(2163) 22 April 1986 & JP-A-60 237 387 ( HIDEHIKO TANAKA ) 26 November 1985 *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 389 (P-531)(2446) 26 December 1986 & JP-A-61 176 879 ( TOPPAN PRINTING CO LTD ) 8 August 1986 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 327 (P-415)(2050) 21 December 1985 & JP-A-60 151 578 ( TOPPAN INSATU K.K. ) 9 August 1985 *
See also references of WO9104520A1 *

Also Published As

Publication number Publication date
AU6409990A (en) 1991-04-18
BR9007670A (en) 1992-06-02
AU649413B2 (en) 1994-05-26
CN1028259C (en) 1995-04-19
CN1051096A (en) 1991-05-01
CA2066603A1 (en) 1991-03-21
WO1991004520A1 (en) 1991-04-04
EP0493436B1 (en) 1995-12-27
ATE132283T1 (en) 1996-01-15
ZA907503B (en) 1991-07-31
JPH05500713A (en) 1993-02-12
NZ230716A (en) 1993-08-26
DE69024497D1 (en) 1996-02-08
EP0493436A4 (en) 1993-03-17
IE903393A1 (en) 1991-04-10
KR920704202A (en) 1992-12-19

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