CA1116687A - Toner fixing method - Google Patents
Toner fixing methodInfo
- Publication number
- CA1116687A CA1116687A CA000335212A CA335212A CA1116687A CA 1116687 A CA1116687 A CA 1116687A CA 000335212 A CA000335212 A CA 000335212A CA 335212 A CA335212 A CA 335212A CA 1116687 A CA1116687 A CA 1116687A
- Authority
- CA
- Canada
- Prior art keywords
- irradiation
- fixing method
- toner
- frequency
- toner fixing
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000003252 repetitive effect Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- SYHGEUNFJIGTRX-UHFFFAOYSA-N methylenedioxypyrovalerone Chemical compound C=1C=C2OCOC2=CC=1C(=O)C(CCC)N1CCCC1 SYHGEUNFJIGTRX-UHFFFAOYSA-N 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2007—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters
- G03G15/201—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters of high intensity and short duration, i.e. flash fusing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
In a toner fixing method employing multiple irradiation by light of a flash discharge lamp in electronic duplicating machines, the repetitive frequency of irradiation is selected in the range of 1.2 to 3.5 Hz so that repeated energization of the lamp does not exert a bad influence on the service life of the lamp and its lighting device.
In a toner fixing method employing multiple irradiation by light of a flash discharge lamp in electronic duplicating machines, the repetitive frequency of irradiation is selected in the range of 1.2 to 3.5 Hz so that repeated energization of the lamp does not exert a bad influence on the service life of the lamp and its lighting device.
Description
This invention relates to a toner fixing method in an electrostatic type recording instrument, such as an electronic duplicating machine or the lilce.
For fixing a toner in electronic duplicating machines, use has long been made of an infrared lamp or heater; and in recent years, it has been pro-posed to employ, for this purpose, irradiation by light of a flash discharge lamp.
The two methods have merits and demerits, and the latter still have many problems remaining unsolved. For example, a minimum value of energy 1~ necessary for fixing the toner depends on the size of paper on which the toner is to be fixed; but, it is still unknown what method is optimum for providing the energy by irradiation using a flash discharge lamp.
This invention is based on the findings that it is better to provide the energy for the toner fixation by irradiating a plurality of times rather than once and that definition of the frequency of irradiation in a certain range provides favorable results. The present invention has for its object to provide a toner fixing method which does not shorten the lifetime of a flash discharge lamp and its lighting circuit.
Briefly stated, in the toner fixing method of this invention, the toner is fixed by multiple irradiation using a flash discharge lamp, and the frequency of irradiation is selected in the range of 1.2 to 3.5 Hz.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Letting E represent the energy necessary for fixing a toner, 1CV
represent the energy of one irradiation and f(Hz) represent the frequency of irradiation, they bear the following relationship:
1/2CV = E/f In the multiple irradiation the frequency f is an important factor for the toner fixation.
If the frequency f is too high, there is not sufficient time to allow cooling of a discharge capacitor of a lighting device; therefore, to suppress a temperature rise of the discharge capacitor, the frequency must be defined. Conversely, if the frequency f is too low, the energy of one irradiation l/2CV must be increased; but this results in the ser~ice life of the flash discharge lamp becoming short. At any rate, it is preferred to define the upper and lower limits of the frequency f. For instance, in the case where l/2CV = 250 joules, irradiation is performed three times in two seconds and the entire energy to the toner fixation is 250 x 3 = 750 joules, the temperature rise of the discharge capacitor is held below 10 C, and the flash discharge lamp withstands more than five million energization times. In this case, the frequency f is 1.5.
As a result of investigation of the frequency f to obtain a temp-erature rise of less than 10 C for the discharge capacitor and a lifetime of five million times of energization for the flash discharge lamp, it has been found that f~3.5 allows a temperature rise up to about 20 C and hence is not preferred, that f~ 1.2 results in a lifetime of about three million times of energization and hence is also undesirable and that 1.2 C f ~ 3.5 ensures toner fixation without shortening the service life of the flash discharge lamp and its lighting circuit.
' ~
'~
6~
Therefore, in the toner fixing method of the present invention, the frequency of irradiation is selected in the range of 1.2 to 3.5 Hz; accord-ingly, the method of this invention is of great utility when put to use.
For fixing a toner in electronic duplicating machines, use has long been made of an infrared lamp or heater; and in recent years, it has been pro-posed to employ, for this purpose, irradiation by light of a flash discharge lamp.
The two methods have merits and demerits, and the latter still have many problems remaining unsolved. For example, a minimum value of energy 1~ necessary for fixing the toner depends on the size of paper on which the toner is to be fixed; but, it is still unknown what method is optimum for providing the energy by irradiation using a flash discharge lamp.
This invention is based on the findings that it is better to provide the energy for the toner fixation by irradiating a plurality of times rather than once and that definition of the frequency of irradiation in a certain range provides favorable results. The present invention has for its object to provide a toner fixing method which does not shorten the lifetime of a flash discharge lamp and its lighting circuit.
Briefly stated, in the toner fixing method of this invention, the toner is fixed by multiple irradiation using a flash discharge lamp, and the frequency of irradiation is selected in the range of 1.2 to 3.5 Hz.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Letting E represent the energy necessary for fixing a toner, 1CV
represent the energy of one irradiation and f(Hz) represent the frequency of irradiation, they bear the following relationship:
1/2CV = E/f In the multiple irradiation the frequency f is an important factor for the toner fixation.
If the frequency f is too high, there is not sufficient time to allow cooling of a discharge capacitor of a lighting device; therefore, to suppress a temperature rise of the discharge capacitor, the frequency must be defined. Conversely, if the frequency f is too low, the energy of one irradiation l/2CV must be increased; but this results in the ser~ice life of the flash discharge lamp becoming short. At any rate, it is preferred to define the upper and lower limits of the frequency f. For instance, in the case where l/2CV = 250 joules, irradiation is performed three times in two seconds and the entire energy to the toner fixation is 250 x 3 = 750 joules, the temperature rise of the discharge capacitor is held below 10 C, and the flash discharge lamp withstands more than five million energization times. In this case, the frequency f is 1.5.
As a result of investigation of the frequency f to obtain a temp-erature rise of less than 10 C for the discharge capacitor and a lifetime of five million times of energization for the flash discharge lamp, it has been found that f~3.5 allows a temperature rise up to about 20 C and hence is not preferred, that f~ 1.2 results in a lifetime of about three million times of energization and hence is also undesirable and that 1.2 C f ~ 3.5 ensures toner fixation without shortening the service life of the flash discharge lamp and its lighting circuit.
' ~
'~
6~
Therefore, in the toner fixing method of the present invention, the frequency of irradiation is selected in the range of 1.2 to 3.5 Hz; accord-ingly, the method of this invention is of great utility when put to use.
Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A toner fixing method employing irradiation by light of a flash discharge lamp in electronic duplicating machines, in which the frequency of irradiation is defined in the range of 1.2 to 3.5 Hz.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10979478A JPS5536836A (en) | 1978-09-08 | 1978-09-08 | Toner fixing method |
| JP109794/1978 | 1978-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1116687A true CA1116687A (en) | 1982-01-19 |
Family
ID=14519381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000335212A Expired CA1116687A (en) | 1978-09-08 | 1979-09-07 | Toner fixing method |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5536836A (en) |
| CA (1) | CA1116687A (en) |
| DE (1) | DE2933691C2 (en) |
| GB (1) | GB2034637B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4444487A (en) * | 1979-07-02 | 1984-04-24 | Xerox Corporation | Multiple-flash fuser |
| DE3417376C2 (en) * | 1983-05-13 | 1993-12-16 | Canon Kk | Record carrier |
| JPS63269185A (en) * | 1987-04-28 | 1988-11-07 | Ricoh Totsuki Kk | Toner fixing method |
| JP2640137B2 (en) * | 1989-02-28 | 1997-08-13 | 富士写真フイルム株式会社 | Positive photoresist composition |
| DE4018025A1 (en) * | 1990-06-05 | 1991-12-12 | Computer Systeme Und Automatio | ENDLESS LASER LABEL PRINTER |
| US6587665B2 (en) | 2000-12-22 | 2003-07-01 | Nexpress Solutions Llc | Digital printer or copier machine and processes for fixing a toner image |
| DE10115066B4 (en) * | 2001-03-27 | 2012-10-04 | Leica Biosystems Nussloch Gmbh | Device for drying solvent-based ink |
-
1978
- 1978-09-08 JP JP10979478A patent/JPS5536836A/en active Pending
-
1979
- 1979-08-20 DE DE19792933691 patent/DE2933691C2/en not_active Expired
- 1979-09-07 CA CA000335212A patent/CA1116687A/en not_active Expired
- 1979-09-07 GB GB7931157A patent/GB2034637B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2034637A (en) | 1980-06-11 |
| GB2034637B (en) | 1982-09-15 |
| DE2933691C2 (en) | 1982-04-15 |
| JPS5536836A (en) | 1980-03-14 |
| DE2933691A1 (en) | 1980-03-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |