US3813677A - Heat-sensitive record - Google Patents

Heat-sensitive record Download PDF

Info

Publication number
US3813677A
US3813677A US00333482A US33348273A US3813677A US 3813677 A US3813677 A US 3813677A US 00333482 A US00333482 A US 00333482A US 33348273 A US33348273 A US 33348273A US 3813677 A US3813677 A US 3813677A
Authority
US
United States
Prior art keywords
heat
sensitive
thermal head
head
pulse
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 - Lifetime
Application number
US00333482A
Other languages
English (en)
Inventor
W Shimotsuma
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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
Priority claimed from JP1861372A external-priority patent/JPS5310866B2/ja
Priority claimed from JP2385272A external-priority patent/JPS4892046A/ja
Priority claimed from JP4400072A external-priority patent/JPS5640036B2/ja
Priority claimed from JP47048757A external-priority patent/JPS5231184B2/ja
Priority claimed from JP9082072A external-priority patent/JPS5640037B2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of US3813677A publication Critical patent/US3813677A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
    • G01D15/10—Heated recording elements acting on heatsensitive layers

Definitions

  • the ink recording method which'is the most generally employed prior art recording method, has such a drawback that the recording sheet would be bro- .ken if a signal containing noise is recorded at a low speed (for instance, at a recording sheet feed speed of X f mm/sec.).
  • a signal containing noise is recorded at a low speed (for instance, at a recording sheet feed speed of X f mm/sec.).
  • the operators clothes as well as the instrument are likely to be stained with slowly drying ink.
  • ink is very susceptible to the state of the ink pen and atmospheric pressure, often resulting in excessive orinsufficient inkv supply.
  • An object of the present invention is to provide a perfectly automatic recorderwithout requiring any replenishment of ink or developing agent and any aftertreatment such as developing and fixing.
  • Another object of the invention is to provide a heatsensitive recorder, which gives records of a uniform quality irrespective of changes of the speed of the thermal head. i i I A further object of the invention is to provide a heatsensitive recorder, which gives records in different colors with a single recording head.
  • FIG. I is a schematic representation of the basic arrangement according to the invention.
  • FIG. 2 is a schematic showing an example of the control circuit for thermally controlling a recording head
  • control circuit for controlling pulse energy supplied to I a head either accordingto an external signal or manuy
  • FIG. 14 is a-graph showing relative record density and width of the record trace as functions of the recording speed of the recorder according to the invention.
  • FIG. 15 is a graph showing relative resistance change in various heads plotted against the record length parts.
  • the invention is based upon the adoptation of a novel heat-sensitive recording method for the recording rneans of analog measurement recorders (hereinafter referred to as recorders).
  • the heat-sensitive recorder according to the invention comprises, as its recording means, a thermal head, a heat-sensitive recording sheet (hereinafter referred to as heat-sensitive sheet) and a control circuit for thermally controlling the thermal head.
  • a disc la formed with a number of circumferentially spaced apertures is secured to the shaft of the servo motor I, and a photoelectric converter 1b which co-operates with the disc 1a detects the speed of the servo motor 1.
  • the speed of the synchronous motor 3 is detected by a detecting means 3a.
  • FIG. 2 shows an electric circuit used in the system of FIG. 1.
  • a photo-diode 11a which is provided in the photoelectric converter lb constitutes a photochopper 11, whose output is coupled to a shaper amplifier 12 consisting of transistors 12a and 12b.
  • the detecting means 3a shown in FIG. 1 may include a select switch 15a to select a resistance under 3 the control of a feed speed determining operation and a unijunction transistor 15b.
  • a group of resistors 150 which are switched by the select switch 15a constitutes a charging path to charge a capacitor 15d.
  • the unijunction transistor 15b When a predetermined voltage is built up across the capacitor 15d, the unijunction transistor 15b is turned on, causing the discharging of the capacitor 15d until the transistor 15b eventually becomes off. In this way, the circuit 15 provides pulses at a predetermined frequency.
  • the outputs of the circuits l2 and 15 are impressed upon a mono-stable multi-vibrator 13 consisting of transistors 13a and 13b, so that the multi-vibrator produces a pulse output, which. is power amplified by an amplifier I4 for coupling across terminals 16 connected to the thermal head 6.
  • the thermal head (hereinafter referred to as head) is an essential element in this invention, and it will now be described in detail in connection with examples shown in FIGS. 3 to 5.
  • the head may be made from silicon used as base material.
  • usual semiconductor techniques are used to diffuse phosphorus or boron into a P- or N-type silicon substrate I9 having a configuration as shown in FIG. 3, 4 or 5 to form a heat generating, resistive layer 18 such that a substrate portion I7 constitutes a heat generating area.
  • the layer 18 is made to have P -type conductivity if the substrate 19 is of N-type, or it is made to be of N -type if the substrate is of P-type.
  • the thickness of the layer 18 is suitably l to 40 microns.
  • electrodes contiguous to the layer I8 are formed by depositing aluminum.
  • nickel and copper are deposited, and the resultant system is finally electroplated with copper.
  • heat generating layer 18 is formed in portion 17 by well-known means such as spattering and vapor phase deposition.
  • numeral 17 designates a heat generating surface
  • numeral 19 a base material
  • numeral 18 a heat generating layer
  • numeral 20 an electrode
  • the heat-sensitive sheet is required to color or undergo a color change only at its heated portion.
  • the coloring agent may be prepared by combining a leuco-die and a phenol compound or organic acid or combining an organic metallic soap and an organic reducing agent.
  • the leuco-die may be used crystal violet lactone (coloring blue) and phenylrhodamine lactone (coloring red).
  • the phenol compound bisphenoI A is suitable.
  • Suitable organic metallic soaps are ferric stearate and silver behenic acid, and suitable organic reducing agents are gallic acid and protocatechuic acid.
  • the dispersion medium and binder may be used polyvinyl alcohol, polyvinyl acetate and acrylate-vinyl acetate copolymers.
  • FIGS. 10 to 12 show examples of the heat-sensitive sheet structure.
  • the coloring agents are prepared from the combination of leuco-die and phenol compound.
  • numeral 23 designates a base sheet of fine quality paper of the order of 20 to g/m and numeral 24 a binder such as mentioned above.
  • Bisphenol A and crystal violet lactone are dispersed in the binder layer as respectively designated at 26 and at 25.
  • the particles of the components 25 and 26 range between 1 and 5 microns in diameter, and their parts ratio is l 1 10 to l 25.
  • the total quantity of coating is 3 to 7 g/m
  • This example is a single-color heat-sensitive sheet, and it is rendered blue by one-second heating of it at a temperature of C.
  • FIG. 11 is a two-color heat-sensitive sheet. It colors red when the one-second heating temperature is 90C, and it becomes green at a temperature of l00C.
  • the particle diameter, parts ratio between Ieuco-die and phenol compound and total quantity of coating of the individual coating layers are similar to those in the FIG. I0 example.
  • numeral 27 designates leuco-phenylrhodamine R (coloring red)
  • numeral 28 Ieuco-malachite green.
  • FIG. 12 is a combination of the FIG. 11 and FIG. 10 examples. It is a three-color heatsensitive sheet coloring blue at 90C, red at C and green at C.
  • the two-color, three-color and other multicolor sheets it is desirable from the standpoint of improving the color separation to provide between adjacent coating layers an intervening layer containing bisphenol A, stear amide, etc., dispersed in a binder.
  • the pulse supply rate with respect to the X direction is, for instance, set to 10 to 10 pulses per one millimeter of progress of the heatis necessary for coloring blue, 2 3 millijoules per pulse for red, and 3 to 5 millijoules per pulse for green.
  • the thermal energy transferred to the heat-sensitive sheet is insufiicient for a certain initial period until a saturation is reached. This is inevitable even if the head is furnished with pulse energy at a constant rate under fundamentally excellent thermal controlof the head insofar as the heat capacity of the head is not zero.
  • the initial time until reaching of the stauration differs with the supplied pulse energy, and it is 5 to seconds with the energy supply of 5 millijoules per pulse and 100 to 500 seconds with l millijoule per pulse.
  • the variation of the record density due to this staturation time is negligible in the continuous use of the recorder, but where the recorder is used intermittently the instability of the record quality would give rise to various problems.
  • This compensation method unlike other methods such as one based on the detection of the head temperature and one where a thermistor heater is inserted in series with the head, requires no lead of any movable part and enables free adjustment of the saturation curve.
  • numeral 31 designates a comparator to receive external color switch signals
  • numeral 33 an amplifier
  • the circuit of FIG. 13 was incorporated together with the circuit of FIG. 2 in a recorder having the mechanism of FIG. I, and the silicon head of FIG. 3 and the two-color heat-sensitive sheet of FIG. 11 were employed.
  • the pulse length of the pulse energy supplied to the head was controlled with thermistor 29 and variable resistor 32 shown in FIG. 13 such as to obtain recording in red color with l.5 millijoules and recording in green color with 3.0 millijoules.
  • the thermistor 29 suitably offers a resistance of 80 kiloohms at normal temperature and a resistance of 50 kiloohms after the saturation time is elapsed, and the resistance of the resistor 32 is suitably 5O kiloohms.
  • the heat-sensitive recorder having the basic construction as described before in connection with FIGS.
  • I and 2 has the important feature that no maintenance is required at all until the recording sheet is used up.
  • the record quality obtainable with it is superior to that obtainable with any other heat-sensitive recorder.
  • the recorder refers to the clearness of the record trace and uniformity of the width of the record trace within a recording speed range of 5 X 10' to 3 X 10 mm/sec. By way of example, it may be represented in terms of relative record density and width of the record trace related to the recording speed, as shown in FIG. 14.
  • curves 38 and 40 represent characteristics of well-known heat-sensitive recorders employed for electrocardiographs and the like and using nichrome wire heaters
  • curves 37 and 39 represent characteristics obtained in accordance with the invention. With these latter characteristics recording with constant resolution and density can be ensured irrespective of whatever changes occur in the magnitude of the signal to be recorded and recording speed.
  • heads As have been mentioned earlier in connection with FIGS. 3 to 5, there are various types of heads to be used in the preceding embodiment, and they are classed on the basis of material and structure. Of these heads, those made from silicon and formed with a heat generating superficial resistive layer are superior to others in the half-wave period, which will be described hereinafter.
  • the half-wave period is an index of the rising performance of the head. It is determined by setting the recorder such that a record density of 1.0 is obtained with the blue-color heat-sensitive sheet of FIG. 10 and the controlled head such as ones listed in Table l and at a recording speed of 60 mm/sec. and by interrupting and resuming the recording operation. It is the time required until the reaching of a record density of 0.5 from the instant of resuming the recording after the head has been cooled down to normal temperature.
  • Table 1 lists heads of various materials and configurations and their half-wave period.
  • the half-wave period depends not only upon the head material but also upon the head structure. In average, it is about 3.2 seconds with the head configuration of FIG. 3, 7.7 seconds with the configuration of FIG. 4 and 10.2 seconds with the configuration of FIG. 5.
  • Considering the average half-wave period with regard to the material of the head it is 1.4 seconds in case of silicon heads having the configuration of FIG. 3 while it is 5.1 seconds in case of ceramic heads of the same configuration.
  • the heat generating layer is what is indicated at 18 in FIGS. 3 to 5.
  • the half-wave time is the time required until the reaching of half the normal value of the record density.
  • the heads of various materials and configurations that may be prepared for use in accordance with the invention, and those made of silicon are advantageous in view of the half-wave time.
  • the heads of ceramic materi- -als have a certain merit as will be described hereinafter.
  • the recorder ac'c'afiifig'io the invention features freedom from maintenance other than the replacement of the recording sheet during recording.
  • the tip of the head wears with increase of the number of replacements of the recording sheet, and the resistance ⁇ It is practically impossible to form as thick a heat generness of 0.5 mm, which had been obtained by sintering of the head is ultimately increased to such an extent that the recording is no longer possible.
  • the service life of the head before the reaching of this state may be increased by covering the heat tip with a hard material such as'silicon carbide and alumina. By so doing, no practical problem will be encountered even after the head has traced beyond a record length of 100 km.
  • Curves 41 to 43 in FIG. 15 represent characteristics of respective heads, whose respective heat generating a 0.58-mm thick dry film of silver palladium (manufactured by Du Pont Corporation) formed by the screen printing method on alumina, showed the characteristic of curve 43.
  • the service life of the head may also be greatly extended by rounding the tip of the head. This effect has no bearing upon the material of the head, and this aspect will now be discussed in connection with FIGS. 7 to 9 and the graph of FIG. 15.
  • Curve 44 in FIG. 15 represents the characteristic of a silicon head having the configuration of FIG. 3 and a heat generating layer with a thickness of 1 micron.
  • curve 45 represents the characteristic of different silicon heads, whose heat generating layer is also 1 micron thick, but which are manufactured by shaping the substrate into the contours of FIGS. 7 to 9 by the well-known electrolytic polishing technique before the impurity diffusion treatment. It will be evident from these curves 44 and 45 that the service life of the head greatly differs with the shape of its tip. It is thought that this effect depends for its analysis upon the state of contact between head and heat-sensitive sheet. With the head shape of FIG. 3 a contact state as shown in FIG. 6 would result, and only the edges of the heat generating surface would selectively Wear,
  • FIG. 16 shows values of the heat attenuation time that were obtained for various ratios of heat generating layer area to contact area of the heads listed in Table I.
  • the number attached to each plot is the same as the rererence number of the corresponding head listed in Table l.
  • the empirical upper limit of the permissible heat attenuation time is 2.5 seconds, so that the area ratio should be less than 3 to obtain effective results.
  • the record quality was excellent because the record density and width of the record trace were steady and stable even with changes of the recording speed as are evident from FIG. 14.
  • multi-color heat-sensitive sheets which constitute an essential element of the invention.
  • leuce-dies andorganic metallic soaps are useful as the main composition of the coloring agent used. in the preparation of the uni-color or multicolor heat-sensitive sheets. The following description will concernwith which. one of these two types of materials is superior.
  • a heat-sensitive sheet having the structure of FIG. 11 and using leuco-phenylrhodamine for the lower coating layer and crystal violet lactone for the upper coating layer enabled to obtain clear records in blue color at the low head temperature and in red color at the high head temperature.
  • a heat-sensitive sheet having the structure of FIG. 11 and using leuco-phenylrhodamine for the lower coating layer and crystal violet lactone for the upper coating layer enabled to obtain clear records in blue color at the low head temperature and in red color at the high head temperature.
  • the head 6 shown in FIG. I is furnished with pulses provided on the basis of the signal produced from the servo motor 1 in accordance with the speed of the relative movement of the head.
  • the suitable rate of the pulse supply is l to 5 pulses per millimeter of the movement of the head.
  • the suitable width of the record'trace is in a range of 0.3 to 0.5 mm.
  • the size of the heat tip which may be either square or circular, is about 0.4 mm on the side or in diameter, respectively.
  • solid record trace may be obtained at a pulse supply rate within the afore-mentioned range of l to 5 pulses per mm.
  • a pulse supply rate below this range for instance at a rate of 0.5 pulse per mm, a broken record trace wouid result.
  • the pulse frequency of the output signal of the circuit 15 in FIG. 2 ensures the supply of pulses to the head to cause the coloring of the heat-sensitive sheet even when the speed of the head in the Y direction becomes zero. Its suitable value is 10 to 10 pulses per mm when the afore-mentioned pulse supply rate according to the relative movement of the head ranges between 1 and 5 pulses per mm.
  • the record density in the X direction would be too high or too low in comparison to that in the Y direction when the input to the recorder becomes zero even if the pulse energy is so adjusted as to obtain a suitable record density in the presence of the input.
  • the color or hue of recording would also change, so that the correspondence between input signal and record would become indistinct.
  • clear records may be obtained by using single-color and multi-color heat-sensitive sheets.
  • the selection of the record density and color of recording can be achieved by adjusting the pulse energy supplied to the head.
  • a pulse energy range of l to 5 millijoules per pulse is enough for any one of the aforementioned heads.
  • clear records could be obtained in green color with l to 2 millijoules per pulse, in blue color with 2.5 to 3.5 millijoules per pulse and in red color with 4 to 5 millijoules per pulse.
  • the record density and color of recording are affected by the head temperature in the initial stage of recording before the normal recording condition sets in, and this drawback can be overcome by having the pulse length and pulse energy slightly increased during the initial recording stage. By this means, it is made possible to obtain a constant record quality without using any extra lead leading to the head and irrespective of whether the recording is made intermittently or continuously.
  • the basic arrangement according to the invention as mentioned earlier has a further merit in that threshold values of the input signal and time marks may be additionally recorded in a separate color in course of the recording by positively controlling the pulse energy.
  • a heat-sensitive recorder comprising a. a thermal head furnished with electrical power for heating,
  • first detecting means to detect the distance traveled by said thermal head and to produce first trigger signals at intervals proportional to said detected distance
  • second detecting means to detect the distance traveled by said heat-sensitive recording sheet and to produce second trigger signals at intervals proportional to said detected distance
  • a pulse generator receiving said first and second trigger signals and producing a pulse output at controlled average pulse frequencies
  • g. means to control power supplied to said thermal head according to the pulse output from said pulse generator.
  • said thermal head consists of silicon and is provided with a superficial heat generating resistive layer formed by selectively diffusing such an impurity as phosphorus and boron into the silicon material.
  • a heat-sensitive recorder according to claim 1, wherein the heat generating surface of said thermal head is formed in the shape of a smooth curved-surface having a U-shaped cross section.
  • a heat-sensitive recorder according to claim 1, wherein the area of the heat generating surface of said thermal head is no greater than about three times the area of contact between said thermal head and heatsensitive recording sheet.
  • a heat-sensitive recorder according to claim 1, wherein said heat-sensitive recording sheet is capable of changing the color of recording or record density, and which further comprises a control means to control power supplied to said thermal head such as to obtain records in various colors or with various record densities.
  • a heat-sensitive recorder which further comprises means to compare the level of signals to be recorded and a particular reference level, the output signal from said comparing means being used to control said control means.
  • a heat-sensitive recorder wherein said heat-sensitive recording sheet is a multicolor heat-sensitive sheet consisting of a base sheet and one or more coating layers formed on said base sheet and containing a leuco-die and a phenol compound or an organic acid as heat-sensitive coloring components.
  • a heat-sensitive recorder which further comprises one or more additional thermal heads, and means to cause the movement of the individual thermal heads according to different input signals and supply energy of different levels to the individual thermal heads for recording in different colors.
  • a heat-sensitive recorder wherein the rate of pulse supply with respect to the movement of said thermal head is within a range between and 5 pulses per millimeter of movement of said thermal head and the rate of pulse supply with respect to the progress of said heat-sensitive recording sheet is within a range between 10 and 10 pulses per millimeter of progress of said recording sheet, the energy in each pulse being within a range between 1 and 5 millijoules.
  • a heat-sensitive recorder which further comprises means to increase the pulse energy supplied to the thermal head during an initial recording period until normal recording conditions set

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Electronic Switches (AREA)
US00333482A 1972-02-23 1973-02-20 Heat-sensitive record Expired - Lifetime US3813677A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP1861372A JPS5310866B2 (enrdf_load_stackoverflow) 1972-02-23 1972-02-23
JP2385272A JPS4892046A (enrdf_load_stackoverflow) 1972-03-08 1972-03-08
JP4400072A JPS5640036B2 (enrdf_load_stackoverflow) 1972-05-02 1972-05-02
JP47048757A JPS5231184B2 (enrdf_load_stackoverflow) 1972-05-16 1972-05-16
JP9082072A JPS5640037B2 (enrdf_load_stackoverflow) 1972-09-08 1972-09-08

Publications (1)

Publication Number Publication Date
US3813677A true US3813677A (en) 1974-05-28

Family

ID=27520051

Family Applications (1)

Application Number Title Priority Date Filing Date
US00333482A Expired - Lifetime US3813677A (en) 1972-02-23 1973-02-20 Heat-sensitive record

Country Status (6)

Country Link
US (1) US3813677A (enrdf_load_stackoverflow)
AU (1) AU460872B2 (enrdf_load_stackoverflow)
DE (1) DE2308577B2 (enrdf_load_stackoverflow)
FR (1) FR2184270A5 (enrdf_load_stackoverflow)
GB (1) GB1391392A (enrdf_load_stackoverflow)
NL (1) NL160387C (enrdf_load_stackoverflow)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939325A (en) * 1972-12-01 1976-02-17 Matsushita Electric Industrial Co., Ltd. Thermal record printer head and method of making the same
US4046074A (en) * 1976-02-02 1977-09-06 International Business Machines Corporation Non-impact printing system
US4092649A (en) * 1977-03-30 1978-05-30 Honeywell Inc. Thermographic recorder energizing its heated stylus independently of stylus resistance
US4113391A (en) * 1975-10-27 1978-09-12 Kabushiki Kaisha Suwa Seikosha Method for controlling voltage and providing temperature compensation in a thermal printer
US4139854A (en) * 1977-11-21 1979-02-13 M.F.E., Inc. Variable temperature recording stylus
US4168505A (en) * 1978-10-04 1979-09-18 Atlan-Tol Industries, Inc. Stylus construction
FR2457771A1 (fr) * 1979-06-01 1980-12-26 Thomson Csf Dispositif de commande de la tension d'alimentation d'une tete d'impression thermique et imprimante thermique comportant un tel dispositif
US4291315A (en) * 1979-12-28 1981-09-22 International Business Machines Corporation Apparatus for providing a constant density trace of ECG analog signals
US4297714A (en) * 1977-04-05 1981-10-27 Nippon Toki Kabushiki Kaisha Thermal pen
US4485294A (en) * 1983-03-18 1984-11-27 Phoenix Medical Corporation Developer for photothermographic paper
EP0101311A3 (en) * 1982-08-12 1984-12-12 Kabushiki Kaisha Ishida Koki Seisakusho Composite label and its manufacture
US4605938A (en) * 1984-04-27 1986-08-12 Hitachi, Ltd. Thermal transfer recording apparatus
EP0097758A3 (en) * 1982-06-28 1986-12-03 Graphtec Kabushiki Kaisha Heating circuit for a thermal recording-pen
US4679053A (en) * 1983-12-29 1987-07-07 Konishiroku Photo Industry Co., Ltd. Thermal variable velocity printer system
US4755831A (en) * 1985-06-28 1988-07-05 Ricoh Company, Ltd. Multi-layer full-color thermosensitive sheet recording method
US4768042A (en) * 1986-05-06 1988-08-30 Alps Electric Co., Ltd. Thermosensitive gradation printer
US4857941A (en) * 1987-04-16 1989-08-15 Fuji Photo Film Co., Ltd. Multicolor thermal recording device
US5118920A (en) * 1989-12-11 1992-06-02 Canon Kabushiki Kaisha Image fixing apparatus
EP0727315A3 (en) * 1995-02-20 1997-04-09 Daisey Kikai Co Ltd Letter printing method for a packaging machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1084249B (it) * 1977-09-19 1985-05-25 Istrumenti Di Misura C G S Spa Dispositivo di scrittura termica per apparecchiature di registrazione.
JPS564481A (en) * 1979-06-22 1981-01-17 Tdk Corp Thermal pen tip and preparation thereof
DE3029146C2 (de) * 1980-07-31 1982-05-06 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur Erzeugung von Markierungsimpulsen für Schreibspuren bei Registriergeräten
DE3040327A1 (de) * 1980-10-25 1982-06-03 Hartmann & Braun Ag, 6000 Frankfurt Elektrisch heizbarer aufzeichnungsschreibstift fuer den schreibzeiger eines registriergeraetes

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644738A (en) * 1951-03-22 1953-07-07 Gen Electric Recording device
US3169821A (en) * 1963-11-20 1965-02-16 Hewlett Packard Co Fluid pressure controller
US3409457A (en) * 1964-01-11 1968-11-05 Agfa Ag Thermographic copying sheet
US3438056A (en) * 1967-04-14 1969-04-08 Blh Electronics Temperature regulation of thermal recording
US3482254A (en) * 1967-12-06 1969-12-02 Telex Inc Apparatus for recording the time-variation of an electrical signal utilizing a pulsed laser
US3501615A (en) * 1967-09-29 1970-03-17 Texas Instruments Inc Integrated heater element array and drive matrix
US3567904A (en) * 1967-12-05 1971-03-02 Henning Gunnar Carlsen Thermoprinting devices
US3588445A (en) * 1969-01-17 1971-06-28 Xerox Corp Fuser control circuit
US3609659A (en) * 1969-01-27 1971-09-28 Raymond Davis Thermal display unit
US3631459A (en) * 1969-08-08 1971-12-28 Texas Instruments Inc Integrated heater element array and drive matrix
US3689937A (en) * 1970-11-09 1972-09-05 Evershed Vignoles Ltd Recording styli and control circuits for styli

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644738A (en) * 1951-03-22 1953-07-07 Gen Electric Recording device
US3169821A (en) * 1963-11-20 1965-02-16 Hewlett Packard Co Fluid pressure controller
US3409457A (en) * 1964-01-11 1968-11-05 Agfa Ag Thermographic copying sheet
US3438056A (en) * 1967-04-14 1969-04-08 Blh Electronics Temperature regulation of thermal recording
US3501615A (en) * 1967-09-29 1970-03-17 Texas Instruments Inc Integrated heater element array and drive matrix
US3567904A (en) * 1967-12-05 1971-03-02 Henning Gunnar Carlsen Thermoprinting devices
US3482254A (en) * 1967-12-06 1969-12-02 Telex Inc Apparatus for recording the time-variation of an electrical signal utilizing a pulsed laser
US3588445A (en) * 1969-01-17 1971-06-28 Xerox Corp Fuser control circuit
US3609659A (en) * 1969-01-27 1971-09-28 Raymond Davis Thermal display unit
US3631459A (en) * 1969-08-08 1971-12-28 Texas Instruments Inc Integrated heater element array and drive matrix
US3689937A (en) * 1970-11-09 1972-09-05 Evershed Vignoles Ltd Recording styli and control circuits for styli

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939325A (en) * 1972-12-01 1976-02-17 Matsushita Electric Industrial Co., Ltd. Thermal record printer head and method of making the same
US4113391A (en) * 1975-10-27 1978-09-12 Kabushiki Kaisha Suwa Seikosha Method for controlling voltage and providing temperature compensation in a thermal printer
US4046074A (en) * 1976-02-02 1977-09-06 International Business Machines Corporation Non-impact printing system
US4092649A (en) * 1977-03-30 1978-05-30 Honeywell Inc. Thermographic recorder energizing its heated stylus independently of stylus resistance
US4297714A (en) * 1977-04-05 1981-10-27 Nippon Toki Kabushiki Kaisha Thermal pen
US4139854A (en) * 1977-11-21 1979-02-13 M.F.E., Inc. Variable temperature recording stylus
US4168505A (en) * 1978-10-04 1979-09-18 Atlan-Tol Industries, Inc. Stylus construction
FR2457771A1 (fr) * 1979-06-01 1980-12-26 Thomson Csf Dispositif de commande de la tension d'alimentation d'une tete d'impression thermique et imprimante thermique comportant un tel dispositif
US4291315A (en) * 1979-12-28 1981-09-22 International Business Machines Corporation Apparatus for providing a constant density trace of ECG analog signals
EP0097758A3 (en) * 1982-06-28 1986-12-03 Graphtec Kabushiki Kaisha Heating circuit for a thermal recording-pen
EP0101311A3 (en) * 1982-08-12 1984-12-12 Kabushiki Kaisha Ishida Koki Seisakusho Composite label and its manufacture
US4627641A (en) * 1982-08-12 1986-12-09 Kabushiki Kaisha Ishida Koki Seisakusho Two-color thermosensitive label
US4485294A (en) * 1983-03-18 1984-11-27 Phoenix Medical Corporation Developer for photothermographic paper
US4679053A (en) * 1983-12-29 1987-07-07 Konishiroku Photo Industry Co., Ltd. Thermal variable velocity printer system
US4605938A (en) * 1984-04-27 1986-08-12 Hitachi, Ltd. Thermal transfer recording apparatus
USRE33496E (en) * 1984-04-27 1990-12-18 Hitachi, Ltd. Thermal transfer recording apparatus
EP0159703B1 (en) * 1984-04-27 1992-02-05 Hitachi, Ltd. Thermal transfer recording apparatus
US4755831A (en) * 1985-06-28 1988-07-05 Ricoh Company, Ltd. Multi-layer full-color thermosensitive sheet recording method
US4768042A (en) * 1986-05-06 1988-08-30 Alps Electric Co., Ltd. Thermosensitive gradation printer
US4857941A (en) * 1987-04-16 1989-08-15 Fuji Photo Film Co., Ltd. Multicolor thermal recording device
US5118920A (en) * 1989-12-11 1992-06-02 Canon Kabushiki Kaisha Image fixing apparatus
EP0727315A3 (en) * 1995-02-20 1997-04-09 Daisey Kikai Co Ltd Letter printing method for a packaging machine

Also Published As

Publication number Publication date
DE2308577B2 (de) 1977-09-01
DE2308577A1 (de) 1973-08-30
AU460872B2 (en) 1975-05-08
NL7302466A (enrdf_load_stackoverflow) 1973-08-27
NL160387C (nl) 1979-10-15
FR2184270A5 (enrdf_load_stackoverflow) 1973-12-21
GB1391392A (en) 1975-04-23
AU5236573A (en) 1974-08-22

Similar Documents

Publication Publication Date Title
US3813677A (en) Heat-sensitive record
US3411948A (en) Electrosensitive recording medium
US4118112A (en) Method for reducing power dissipation in tapered resistor devices
US4849605A (en) Heating resistor and method for making same
US3434878A (en) Method of forming a multicolor electrosensitive recording medium and article
US3299433A (en) Reis electrosbnsitive recording
US912181A (en) Measuring instrument.
KR0162899B1 (ko) 기록매체에 데이터를 열적으로 기록하기 위한 방법 및 장치
JPS62122102A (ja) 感熱記録ヘツド及びその製造方法
JPS598232B2 (ja) サ−マルヘツド用厚膜材料及びサ−マルヘツド
US3377599A (en) Electrosensitive recording apparatus
US3946400A (en) Recorder for electrosensitive record carriers having a segmented counter electrode
JPS5783476A (en) Thermal print head
US5196865A (en) Temperature sensing of heater points in thermal print heads by resistive layer beneath the heating points
US4263105A (en) Electrosensitive recording material and process
JPS5699680A (en) Thermal head
US3474456A (en) Electro-sensitive magnetic recording apparatus and method
JPS5947999B2 (ja) 熱ペン
JPS6259763B2 (enrdf_load_stackoverflow)
US2986717A (en) Thermistor bolometers
JPS63145052A (ja) 熱記録用サ−マルヘツド
JPS59167278A (ja) サ−マルヘツド
JPS59140081A (ja) 感熱転写記録方法及びその装置
JPH01286401A (ja) サーマルヘッド
JPS63193854A (ja) 感熱記録ヘツド及びその製造方法