CA1061852A - Color accenting copying machine - Google Patents
Color accenting copying machineInfo
- Publication number
- CA1061852A CA1061852A CA219,648A CA219648A CA1061852A CA 1061852 A CA1061852 A CA 1061852A CA 219648 A CA219648 A CA 219648A CA 1061852 A CA1061852 A CA 1061852A
- Authority
- CA
- Canada
- Prior art keywords
- color
- original document
- copy
- portions
- latent image
- 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
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
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
Abstract
ABSTRACT OF THE DISCLOSURE
An apparatus and method are disclosed in which copies of an original document are formed wherein portions of the copy are highlighted in at least one color other than the remainder.
The original document is positioned on a substantially transparent support of a reproduction machine and means are provided for adjustably indicating a portion of the original document which is to be copied in a first color with the remainder of the document being in a second color. Circuit means is provided for producing a signal defining the portions of the original document which are to be copied in the first color and in the second color with means responsive to the signal for reproducing the original document from the portions of the copy corresponding to the indicated portions of the original document being formed in the first and second colors. Copies are thus produced from the original document wherein the selected portions are of different colors.
An apparatus and method are disclosed in which copies of an original document are formed wherein portions of the copy are highlighted in at least one color other than the remainder.
The original document is positioned on a substantially transparent support of a reproduction machine and means are provided for adjustably indicating a portion of the original document which is to be copied in a first color with the remainder of the document being in a second color. Circuit means is provided for producing a signal defining the portions of the original document which are to be copied in the first color and in the second color with means responsive to the signal for reproducing the original document from the portions of the copy corresponding to the indicated portions of the original document being formed in the first and second colors. Copies are thus produced from the original document wherein the selected portions are of different colors.
Description
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~s- BACKGROUND OF THE INVENTION
This invention relates to an electrostatographic printing machine, and more particularly concerns an apparatus for forming copies of an original document wherein selected portions of the copy are highlighted in a color other than the i~; 5 remainder thereof.
,~? In electrostatographic printing, an electrostatic latent image is created and reproduced in viewable form. $he : .
process of electrostatographic printing includes electrophoto-graphic and electrographic printing. Electrophotographic printing employs a photosensitive medium to form, with the aid of electromagnetic radiation, an electrostatic latent . ~
; ~ image. Contrawise, electrographic printing employs an insu-~i:
~ lating medium to form, without the aid of electromagnetic :~ :
radiation, an electrostatic latent image. ~ereinafter, an !~ ~
electrophotographic printing machine will be described as ~` an illustrative embodiment of the inventive concept described in the present application.
Electrophotographic printing, as disclosed in U. S.
Patent ~o. 2,297,691 issued to Carlson in 1942, describes exposing a charged photoconductlve member to a light image of an original document. The irradiated areas of the photocon-ductive surface are discharged to record thereon an electro-static latent image corresponding to the original document.
Development of the electrostatic latent image is achieved by bringing a developer mix into contact therewith. A typical ,: ~
^ developer mix employs colored heat settable plastic particles known generally as toner particles, which are mixed with ferro-magnetic granules, i.e. carrier granules. The developer mix is selected such that the toner particles acquire the appropriate , 30 charge relative to the electrostatic latent image recorded on
~s- BACKGROUND OF THE INVENTION
This invention relates to an electrostatographic printing machine, and more particularly concerns an apparatus for forming copies of an original document wherein selected portions of the copy are highlighted in a color other than the i~; 5 remainder thereof.
,~? In electrostatographic printing, an electrostatic latent image is created and reproduced in viewable form. $he : .
process of electrostatographic printing includes electrophoto-graphic and electrographic printing. Electrophotographic printing employs a photosensitive medium to form, with the aid of electromagnetic radiation, an electrostatic latent . ~
; ~ image. Contrawise, electrographic printing employs an insu-~i:
~ lating medium to form, without the aid of electromagnetic :~ :
radiation, an electrostatic latent image. ~ereinafter, an !~ ~
electrophotographic printing machine will be described as ~` an illustrative embodiment of the inventive concept described in the present application.
Electrophotographic printing, as disclosed in U. S.
Patent ~o. 2,297,691 issued to Carlson in 1942, describes exposing a charged photoconductlve member to a light image of an original document. The irradiated areas of the photocon-ductive surface are discharged to record thereon an electro-static latent image corresponding to the original document.
Development of the electrostatic latent image is achieved by bringing a developer mix into contact therewith. A typical ,: ~
^ developer mix employs colored heat settable plastic particles known generally as toner particles, which are mixed with ferro-magnetic granules, i.e. carrier granules. The developer mix is selected such that the toner particles acquire the appropriate , 30 charge relative to the electrostatic latent image recorded on
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the photoconductive surface. As the developer mix is moved into contact with the photoconductive surface, the greater attractive force of the electrostatic latent image causes the :', toner particles to be separated from the carrier granules and ' 5 to adhere to the electrostatic latent image. The toner powder image adhering to the electrostatic latent image is, then, transferred to the sheet of support material. A suitable sheet of support material is paper, or a thermoplastic sheet, amongst others. Subsequently, the toner powder image is permanently affixed to the sheet of support material or copy sheet.
Essentially, multi-color printing repeats the fore-going process a plurality of cycles. For example, U. S. Patent No. 3,531,195 issued to Tanaka, et al. in 1970 discloses a multi-color electrophotographic printing machine. As recited therein, the light image is filtered to record an electro-! static latent image on the photoconductive surface correspond-f~ ' .
ing thereto. The electrostatic latent image is then developed ; with toner particles complimentary in color to the filtered light image. The toner powder image is then transferred to the sheet of support material. The foregoing process is re-r,.~
peated for successively differently colored light images. As described in Tanaka, each toner powder image is fused after being transferred to the sheet of support material. However, one skilled in the art will realize that all of the toner powder images may be fused after being transferred to the sheet of support material rather than being successively fused.
With the advent of multi-color electrophotographic printing, it has become desirable to create copies having portions thereof color highlighted. For example, portions of the original document may be selected and reproduced on the .~ .
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copy in a color different than the remainder thereof. In this manner? the copy will have portions in one color and the remainder thereof in another ~`
color. An arrangement of this type would be highly useful for emphasizing selected paragraphs or portions of a letter. In this case, a selected para-graph or line could be highlighted in red or blue and the remainder thereof .` would be reproduced in black. Thus, the apparatus of the present invention ;,.-. ~ iS directed to producing a copy having portions thereof color accented.
.... . .
Accordingly, it is a primary object of the present invention to improve electrophotographic printing so as to create copies having portions - 10 thereof color highlighted.
Thus, in accordance with the present teachings, a method :~,.. .
.,~, , is provided for forming a copy of an original document with portions of the ;,,~
copy being highlighted in at least one color other than the remainder thereof.
~`, ' The method includes the steps of placing the original on a reproduction mach-~; lne, lndicating portions of the original document to be reproduced in at ..
~ least a first color with the remainder of the copy being in the second color ~
~.~ .
~- ' and activating the reproducing machine to reproduce the original document so ~- ~ that the copy has the indicated portions in at least the first color and the . remainder thereof in the second color.
~' ,s 2Q In accordance with a further embodiment, an apparatus is provided for forming at least a two color copy from a single color original "'`
-~ document. The apparatus includes a support member arranged to hold the original document thereon, means provided for adjustably indicating a portion :,.: ~:. ~
J~ of the original document to be copied in a first color and a portion of the h ~:i original document to be copied in a second color. Circuit means is provided ~, coupled to the indicating means for producing a signal defining the portions ~. .
of the original document to be copied in the first color and second color and means provided responsive to the signal from the circuit means for reproducing the original document with the portions of the copy corresponding to the indicated portions of the original document being formed in the first - and second colors.
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Other ob~ects and advantages of the present inYention will .~ .
become apparent upon reading the following detailed description and upon reference to the drawi`ngs, in which:
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Figure 1 is a schematic perspective view of an - electrophotographic printing machine incorporating the fea-tures of the present invention therein;
Figure 2 is an elevational view of the color high-lighting selector for the Figure 1 printing machine;
Figure 3 is an elevational vi~w, partially in section ~;~ and fragmentary, of the Figure 1 printing machine exposure : . .
system; and Figure 4 is an elevational view, partially fragmen-tary, illustrating the development system and the control panel associated therewith for selecting the highlighting colors.
..
` While the present invention will hereinafter be -~ described in connection with a preferred embodiment, it will be understood that it is not intended to limit the invention ~ 15 to that embodiment. On the contrary, it is intended to cover ? " all alternatives, modifications and equivalents as may be ''f,'`; included within the spirit and the scope of the invention as . . .
` defined by the appended claims.
, DETAILED DESCRIPTION OF THE INVENTION
An electrophotographic printing machine incorporating ~- the features of the present invention is shown in Figure 1.
In the drawings, like reference numerals have been used through-out to designate like elements. The electrophotographic printing machine described hereinafter has the capability of `?'''~ 25 producing black and white copies as well as color highlighted copies. Although the present invention is depicted as being :.:, incorporated in an electrophotographic printing machine, it ~-~ is obvious to one skilled in the art that the present invention is not necessarily limited to that particular embodiment and ... .
~`` 30 the present invention may be employed in various other types , .
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of printing machines.
As depicted in Figure 1, the electrophotographic printing machine employs a photoconductive member having a drum 10 mounted rotatably within the machine frame (not shown).
, Photoconductive surface 12 is mounted on the exterior circum-,ferential surface of drum 10 and entrained thereabout. One :; ~
type of suitable photoconductive material is disclosed in U. S. Patent No. 3,655,377 issued to Sechak in 1972. A series of processing stations are positioned about drum 10 such that ` 10 as drum 10 rotates in the direction of arrow 14 it passes se-~,~ quentially therethrcugh. Drum 10 is driven at a predetermined speed relative to the other machine operating mechanisms by a drive motor (not shown). A timing disc (not shown) mounted in the region of one end of the shaft of drum 10 cooperates ~t' ~' with the machine logic to synchronize the various operations .. . . .
'~, with the rotation of drum 10. In this manner, the proper ~ sequence of events is produced at-the respective processing --' ~ stations.
~ ~ Drum 10 initially rotates photoconductive surface ".~r' ! 12 through charging station A. At charging station A, a '~ - corona generating device, indicated generally at 16, extends longitudinally in a transverse direction across photoconductive surface 12. Corona generating device 16 generates a spray of ,, ions which are deposited on photoconductive surface 12 pro-.
ducing a relatively high, substantially uniform charge thereon.
Corona generating device 16 is described in greater detail in U. S. Patent 3,942,006.
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~ After photoconductive surface 12 is charged to a <
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substantially uniform potential, drum 10 is rotated to exposure station ~. At exposure station B, a light image of an original ~ document is projected onto charged photoconductive surface 12.;~ Exposure station B includes a moving lens system generally des-` 5 ignated by the reference numeral 18. Original document 22, such as a sheet of paper, book or the like is placed face down ~ upon selectlng means 24. Selectlng means 24 lncludes a gen-'` erally planar substantially transparent support member and in-dicator members (Figures 2 and 3). Circuit means couples the ` 10 indicator members to the exposure system. Selecting means 24 will be described hereinafter in greater detail with reference , to Figures 2 and 3. As shown in Figure 1, lamps 26 are adapted to move in a timed relationship with lens 18 to scan successive incremental areas of original document 22, In this manner, a :s .;
flowing light image of original document 22 is projected onto Amb photoconductive surface 12 forming an electrostatic latent ~ ~.
,` ~ image thereon corresponding to the original document. Those ; -portions of the electrostatic latent image being reproduced ~- in black are erased therefrom leaving an electrostatic latent image on photoconductive surface 12 corresponding to the por-tions of the original document being reproduced in a color.
~; ~hereafter, the appropriate developer unit is actuated so as i ~ to deposit toner particles of the corresponding color on the ` latent image. The next successive light image is also of the entire original document. However, at this time, those portions 7~' . ~ !
-~ of the original document hereinbefore developed in the first j; ,. color are erased leaving only the portions being reproduced , ~ :~ in black. The electrostatic latent image remaining on photo-~::
-' conductive surface 12 is then developed with black toner particles.
The successive toner powder images are then transferred to a ~:,.;, .' ' ' ,:.`: ` : `
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~ sheet of support material in registration with one another.
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In the present invention, a flowing light image of ,~
the original document is projected onto photoconductive sur-face 12. Selecting means 24 actuates electroluminescent ~` 5 panel 28. Electroluminescent panel 28 projects light rays onto the electrostatic latent image recorded on photo-conductive surface 12. The light rays from electroluminescent panel 28 erase those portions being reproduced in black. There-after, a flowing light image of the original document is again -~ 10 created. Selecting means 24~ cooperating with the machine - logic, energizes electroluminescent panel 28 so as to erase those portions hereinbefore reproduced in a highlighting color.
The first-mentioned electrostatic latent image is then developed Y with the appropriately colored toner particles; and the second-mentioned latent image is developed with black toner particles.
`~ After the electrostatic latent image is recorded on photoconductive surface 12, drum 10 rotates to development station C. At development station C, three individual developer ~$~ units, generally illdicated by the reference numerals 30, 32 and 34, respectively, are arranged to render visible the ; electrostatic latent image recorded on photoconductive surface ~,.: -,:
~- 12. Preferably, the developer units are of a type generally .'`'h referred to in the art as "magnetic brush developer units".
A typical magnetic brush system employs a magnetized developer mix which includes carrier granules and toner particles. Gen-erally, the toner particles are heat settable. In operation, the developer mix is continually brought through a directional flux field to form a brush thereof. The electrostatic latent , - image recorded on photoconductive surface 12 is brought into ~;~ 30 contact with the brush of developer mix. Toner particles are attracted from the developer mix to the latent image. Each ~...,~
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- of the developer units contain appropriately colored toner particles, For example, the electrostatic latent image cor-responding to the color highlighted portions of the copy may be reproduced with red or cyan toner particles. The next successive latent image corresponding to the black portions of the copy are reproduced with black toner particles. Thus, resultant copy will have portions thereof in black and other ` portions thereof in red or cyan or, in lieu thereof, all three colors. While the present invention has been described as color highlighting a black and white copy with cyan or red, it is obvious to one skilled in the art that any colors may be employed for color highlighting. The development system em-ployed in the Figure 1 printing machine will be described in ~` greater detail with reference to Figure 4.
.~,. . --Drum 10 is next rotated to transfer station D
, where the powder image adhering electrostatically to photo-~ conductive surface 12 is transferred to a sheet of final ;~ support material 36. Support material 36 may be plain paper or a sheet of thermoplastic material, amongst others. Transfer station D includes a transfer roll 38 which is electrically ' biased to a potential of sufficient magnitude and polarity .:
to attract electrostatically the toner particles from the latent image recorded on photoconductive surface 12 to support ~ material 36. Transfer roll 38 rotates in the direction of :"' . J 25 arrow 40 in synchronism with drum 10 to maintain the electro-static latent image recorded on photoconductive surface 12 in ~' registration with support material 36 secured releasably to transfer roll 38.
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Successive toner powder images are transferred thereto -- 30 in registration with one another. In this regard, the first , :
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` toner powder image, i.e. red or cyan toner particles, are ;i transferred to support material 36. Thereafter, the next ~., ~: toner powder image, i.e. black toner particles, are trans-.
;~` ferred to support material 36 in registration with the red or cyan toner particles previously transferred thereto. Thus, two toner powder images are deposited on support material 36, one corresponding to a portion of the original document being reproduced in black, and the other corresponding to the selected :~ .
~;` portion of the original document being color highlighted, i.e.
in red or cyan. Prior to proceeding with the remainder of the electrophotographic printing process, the sheet feeding ~;~ process will be briefly discussed.
Support material 36 is advanced from a stack 42 of , sheet, mounted on tray 44. Feed roll 46, in operative com-munication with retard roll 48, advances and separates the ' ~ uppermost sheet from stack 42. The advancing sheet moves into chute 50 which directs and guides it between register rolls 52. Thereafter, gripper fingers 54 mounted on transfer ,'~ roll 38, secure releasably support material 36 thereto for ; 20 movement therewith in a recirculating path. After the requi-; site number of toner powder images (two in the case of a single ';-`;` color highlight, three in the case of two highlights) have been transferred to support material 36, gripper fingers 54 release support material 36 and space it from transfer roll 38.
~;` 25 Stripper bar 56 is then interposed between support material 36 :~. ` -and transfer roll 38 to separate support material 36 from transfer roll 38. Endless belt conveyor 58 then advances sup-port material 36 to fixing station E.
At fixing station E, a fuser, indicated generally ~; 30 at 60, permanently affixes the transferred powder image to ~`.
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-; support material 36. Fuser 60 is described in greater detail in U. S. Patent 3,826,892. After the fusing process, support material 36 is advanced by endless belt conveyors-62 and--64 to -~-~ catch tray 66 permitting subsequent removal therefrom by the - machine operator.
~ Although a preponderance of the toner particles ;~
are transferred to support material 34, invariably some ~;- residual toner particles remain on photoconductive surface 12after the transfer of the powder image therefrom. Residual toner particles are removed from photoconductive surface 12 ` as it passes through cleaning station F. Here, the residual toner particles are first brought under the influence of a cleaning corona generating device (not shown) adapted to neutralize the electrostatic charge remaining on the residual ` toner particles and photoconducti~e surface 12. The neutral- -ized toner particles are then cleaned from photoconductive ~- surface 12 by a rotatably mounted fibrous brush in contact ~; therewith. A suitable brush cleaning device is described in U. S. Patent No. 3,590,412 issued to Gerbasi in 1971.
The electrophotographic printing machine hereinbefore described, has been described in greater detail in U. S. Patent
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the photoconductive surface. As the developer mix is moved into contact with the photoconductive surface, the greater attractive force of the electrostatic latent image causes the :', toner particles to be separated from the carrier granules and ' 5 to adhere to the electrostatic latent image. The toner powder image adhering to the electrostatic latent image is, then, transferred to the sheet of support material. A suitable sheet of support material is paper, or a thermoplastic sheet, amongst others. Subsequently, the toner powder image is permanently affixed to the sheet of support material or copy sheet.
Essentially, multi-color printing repeats the fore-going process a plurality of cycles. For example, U. S. Patent No. 3,531,195 issued to Tanaka, et al. in 1970 discloses a multi-color electrophotographic printing machine. As recited therein, the light image is filtered to record an electro-! static latent image on the photoconductive surface correspond-f~ ' .
ing thereto. The electrostatic latent image is then developed ; with toner particles complimentary in color to the filtered light image. The toner powder image is then transferred to the sheet of support material. The foregoing process is re-r,.~
peated for successively differently colored light images. As described in Tanaka, each toner powder image is fused after being transferred to the sheet of support material. However, one skilled in the art will realize that all of the toner powder images may be fused after being transferred to the sheet of support material rather than being successively fused.
With the advent of multi-color electrophotographic printing, it has become desirable to create copies having portions thereof color highlighted. For example, portions of the original document may be selected and reproduced on the .~ .
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copy in a color different than the remainder thereof. In this manner? the copy will have portions in one color and the remainder thereof in another ~`
color. An arrangement of this type would be highly useful for emphasizing selected paragraphs or portions of a letter. In this case, a selected para-graph or line could be highlighted in red or blue and the remainder thereof .` would be reproduced in black. Thus, the apparatus of the present invention ;,.-. ~ iS directed to producing a copy having portions thereof color accented.
.... . .
Accordingly, it is a primary object of the present invention to improve electrophotographic printing so as to create copies having portions - 10 thereof color highlighted.
Thus, in accordance with the present teachings, a method :~,.. .
.,~, , is provided for forming a copy of an original document with portions of the ;,,~
copy being highlighted in at least one color other than the remainder thereof.
~`, ' The method includes the steps of placing the original on a reproduction mach-~; lne, lndicating portions of the original document to be reproduced in at ..
~ least a first color with the remainder of the copy being in the second color ~
~.~ .
~- ' and activating the reproducing machine to reproduce the original document so ~- ~ that the copy has the indicated portions in at least the first color and the . remainder thereof in the second color.
~' ,s 2Q In accordance with a further embodiment, an apparatus is provided for forming at least a two color copy from a single color original "'`
-~ document. The apparatus includes a support member arranged to hold the original document thereon, means provided for adjustably indicating a portion :,.: ~:. ~
J~ of the original document to be copied in a first color and a portion of the h ~:i original document to be copied in a second color. Circuit means is provided ~, coupled to the indicating means for producing a signal defining the portions ~. .
of the original document to be copied in the first color and second color and means provided responsive to the signal from the circuit means for reproducing the original document with the portions of the copy corresponding to the indicated portions of the original document being formed in the first - and second colors.
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Other ob~ects and advantages of the present inYention will .~ .
become apparent upon reading the following detailed description and upon reference to the drawi`ngs, in which:
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Figure 1 is a schematic perspective view of an - electrophotographic printing machine incorporating the fea-tures of the present invention therein;
Figure 2 is an elevational view of the color high-lighting selector for the Figure 1 printing machine;
Figure 3 is an elevational vi~w, partially in section ~;~ and fragmentary, of the Figure 1 printing machine exposure : . .
system; and Figure 4 is an elevational view, partially fragmen-tary, illustrating the development system and the control panel associated therewith for selecting the highlighting colors.
..
` While the present invention will hereinafter be -~ described in connection with a preferred embodiment, it will be understood that it is not intended to limit the invention ~ 15 to that embodiment. On the contrary, it is intended to cover ? " all alternatives, modifications and equivalents as may be ''f,'`; included within the spirit and the scope of the invention as . . .
` defined by the appended claims.
, DETAILED DESCRIPTION OF THE INVENTION
An electrophotographic printing machine incorporating ~- the features of the present invention is shown in Figure 1.
In the drawings, like reference numerals have been used through-out to designate like elements. The electrophotographic printing machine described hereinafter has the capability of `?'''~ 25 producing black and white copies as well as color highlighted copies. Although the present invention is depicted as being :.:, incorporated in an electrophotographic printing machine, it ~-~ is obvious to one skilled in the art that the present invention is not necessarily limited to that particular embodiment and ... .
~`` 30 the present invention may be employed in various other types , .
.:
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of printing machines.
As depicted in Figure 1, the electrophotographic printing machine employs a photoconductive member having a drum 10 mounted rotatably within the machine frame (not shown).
, Photoconductive surface 12 is mounted on the exterior circum-,ferential surface of drum 10 and entrained thereabout. One :; ~
type of suitable photoconductive material is disclosed in U. S. Patent No. 3,655,377 issued to Sechak in 1972. A series of processing stations are positioned about drum 10 such that ` 10 as drum 10 rotates in the direction of arrow 14 it passes se-~,~ quentially therethrcugh. Drum 10 is driven at a predetermined speed relative to the other machine operating mechanisms by a drive motor (not shown). A timing disc (not shown) mounted in the region of one end of the shaft of drum 10 cooperates ~t' ~' with the machine logic to synchronize the various operations .. . . .
'~, with the rotation of drum 10. In this manner, the proper ~ sequence of events is produced at-the respective processing --' ~ stations.
~ ~ Drum 10 initially rotates photoconductive surface ".~r' ! 12 through charging station A. At charging station A, a '~ - corona generating device, indicated generally at 16, extends longitudinally in a transverse direction across photoconductive surface 12. Corona generating device 16 generates a spray of ,, ions which are deposited on photoconductive surface 12 pro-.
ducing a relatively high, substantially uniform charge thereon.
Corona generating device 16 is described in greater detail in U. S. Patent 3,942,006.
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~ After photoconductive surface 12 is charged to a <
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substantially uniform potential, drum 10 is rotated to exposure station ~. At exposure station B, a light image of an original ~ document is projected onto charged photoconductive surface 12.;~ Exposure station B includes a moving lens system generally des-` 5 ignated by the reference numeral 18. Original document 22, such as a sheet of paper, book or the like is placed face down ~ upon selectlng means 24. Selectlng means 24 lncludes a gen-'` erally planar substantially transparent support member and in-dicator members (Figures 2 and 3). Circuit means couples the ` 10 indicator members to the exposure system. Selecting means 24 will be described hereinafter in greater detail with reference , to Figures 2 and 3. As shown in Figure 1, lamps 26 are adapted to move in a timed relationship with lens 18 to scan successive incremental areas of original document 22, In this manner, a :s .;
flowing light image of original document 22 is projected onto Amb photoconductive surface 12 forming an electrostatic latent ~ ~.
,` ~ image thereon corresponding to the original document. Those ; -portions of the electrostatic latent image being reproduced ~- in black are erased therefrom leaving an electrostatic latent image on photoconductive surface 12 corresponding to the por-tions of the original document being reproduced in a color.
~; ~hereafter, the appropriate developer unit is actuated so as i ~ to deposit toner particles of the corresponding color on the ` latent image. The next successive light image is also of the entire original document. However, at this time, those portions 7~' . ~ !
-~ of the original document hereinbefore developed in the first j; ,. color are erased leaving only the portions being reproduced , ~ :~ in black. The electrostatic latent image remaining on photo-~::
-' conductive surface 12 is then developed with black toner particles.
The successive toner powder images are then transferred to a ~:,.;, .' ' ' ,:.`: ` : `
~: . . .
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~ sheet of support material in registration with one another.
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In the present invention, a flowing light image of ,~
the original document is projected onto photoconductive sur-face 12. Selecting means 24 actuates electroluminescent ~` 5 panel 28. Electroluminescent panel 28 projects light rays onto the electrostatic latent image recorded on photo-conductive surface 12. The light rays from electroluminescent panel 28 erase those portions being reproduced in black. There-after, a flowing light image of the original document is again -~ 10 created. Selecting means 24~ cooperating with the machine - logic, energizes electroluminescent panel 28 so as to erase those portions hereinbefore reproduced in a highlighting color.
The first-mentioned electrostatic latent image is then developed Y with the appropriately colored toner particles; and the second-mentioned latent image is developed with black toner particles.
`~ After the electrostatic latent image is recorded on photoconductive surface 12, drum 10 rotates to development station C. At development station C, three individual developer ~$~ units, generally illdicated by the reference numerals 30, 32 and 34, respectively, are arranged to render visible the ; electrostatic latent image recorded on photoconductive surface ~,.: -,:
~- 12. Preferably, the developer units are of a type generally .'`'h referred to in the art as "magnetic brush developer units".
A typical magnetic brush system employs a magnetized developer mix which includes carrier granules and toner particles. Gen-erally, the toner particles are heat settable. In operation, the developer mix is continually brought through a directional flux field to form a brush thereof. The electrostatic latent , - image recorded on photoconductive surface 12 is brought into ~;~ 30 contact with the brush of developer mix. Toner particles are attracted from the developer mix to the latent image. Each ~...,~
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- of the developer units contain appropriately colored toner particles, For example, the electrostatic latent image cor-responding to the color highlighted portions of the copy may be reproduced with red or cyan toner particles. The next successive latent image corresponding to the black portions of the copy are reproduced with black toner particles. Thus, resultant copy will have portions thereof in black and other ` portions thereof in red or cyan or, in lieu thereof, all three colors. While the present invention has been described as color highlighting a black and white copy with cyan or red, it is obvious to one skilled in the art that any colors may be employed for color highlighting. The development system em-ployed in the Figure 1 printing machine will be described in ~` greater detail with reference to Figure 4.
.~,. . --Drum 10 is next rotated to transfer station D
, where the powder image adhering electrostatically to photo-~ conductive surface 12 is transferred to a sheet of final ;~ support material 36. Support material 36 may be plain paper or a sheet of thermoplastic material, amongst others. Transfer station D includes a transfer roll 38 which is electrically ' biased to a potential of sufficient magnitude and polarity .:
to attract electrostatically the toner particles from the latent image recorded on photoconductive surface 12 to support ~ material 36. Transfer roll 38 rotates in the direction of :"' . J 25 arrow 40 in synchronism with drum 10 to maintain the electro-static latent image recorded on photoconductive surface 12 in ~' registration with support material 36 secured releasably to transfer roll 38.
.. .
Successive toner powder images are transferred thereto -- 30 in registration with one another. In this regard, the first , :
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.
` toner powder image, i.e. red or cyan toner particles, are ;i transferred to support material 36. Thereafter, the next ~., ~: toner powder image, i.e. black toner particles, are trans-.
;~` ferred to support material 36 in registration with the red or cyan toner particles previously transferred thereto. Thus, two toner powder images are deposited on support material 36, one corresponding to a portion of the original document being reproduced in black, and the other corresponding to the selected :~ .
~;` portion of the original document being color highlighted, i.e.
in red or cyan. Prior to proceeding with the remainder of the electrophotographic printing process, the sheet feeding ~;~ process will be briefly discussed.
Support material 36 is advanced from a stack 42 of , sheet, mounted on tray 44. Feed roll 46, in operative com-munication with retard roll 48, advances and separates the ' ~ uppermost sheet from stack 42. The advancing sheet moves into chute 50 which directs and guides it between register rolls 52. Thereafter, gripper fingers 54 mounted on transfer ,'~ roll 38, secure releasably support material 36 thereto for ; 20 movement therewith in a recirculating path. After the requi-; site number of toner powder images (two in the case of a single ';-`;` color highlight, three in the case of two highlights) have been transferred to support material 36, gripper fingers 54 release support material 36 and space it from transfer roll 38.
~;` 25 Stripper bar 56 is then interposed between support material 36 :~. ` -and transfer roll 38 to separate support material 36 from transfer roll 38. Endless belt conveyor 58 then advances sup-port material 36 to fixing station E.
At fixing station E, a fuser, indicated generally ~; 30 at 60, permanently affixes the transferred powder image to ~`.
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-; support material 36. Fuser 60 is described in greater detail in U. S. Patent 3,826,892. After the fusing process, support material 36 is advanced by endless belt conveyors-62 and--64 to -~-~ catch tray 66 permitting subsequent removal therefrom by the - machine operator.
~ Although a preponderance of the toner particles ;~
are transferred to support material 34, invariably some ~;- residual toner particles remain on photoconductive surface 12after the transfer of the powder image therefrom. Residual toner particles are removed from photoconductive surface 12 ` as it passes through cleaning station F. Here, the residual toner particles are first brought under the influence of a cleaning corona generating device (not shown) adapted to neutralize the electrostatic charge remaining on the residual ` toner particles and photoconducti~e surface 12. The neutral- -ized toner particles are then cleaned from photoconductive ~- surface 12 by a rotatably mounted fibrous brush in contact ~; therewith. A suitable brush cleaning device is described in U. S. Patent No. 3,590,412 issued to Gerbasi in 1971.
The electrophotographic printing machine hereinbefore described, has been described in greater detail in U. S. Patent
3,869,203. It is believed that the foregoing description .-is sufficient for purposes of the present application to depict the general operation of an electrophotographic printing machine ~-~; embodying the features of the present invention therein. The '; -remainder of the discussion will be directed to the specific t , :.
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subject matter of the various of assemblies of the present invention.
Turning now to Figure 2, selecting means 24 is dis-~ closed therein in greater detail. Selecting means 24 includes ;:~
~ ~ 5 a substantially transparent, planar support member 70 having ,~ a plurality of indicator members 72 mounted slidably thereon.
Indicator member 72a is adjusted so as to indicate the start ;X of the first color highlighting portion. Indicator member 72b ;~` is adjusted so as to indicate the stop of the first color high-~; 10 lighting portion. Similarly, indicator members72c and 72d are 'r` adjusted to indicate the start and stop, respectively, of the second color highlighting portion. In order to slidably adjust indicator members 72, support member 70 has a plurality of sub-stantially parallel equally spaced slots 74 therein. In operation, original document 22 is disposed on support member 70 between - locator marks 75 and 76, respectively. Thereafter, indicator .
~- member 72a is moved in slot 74a so as to locate the start of ~; ~ the first color highlighted portion on the copy. Indicator ~` member 72b is also moved in slot 74b so as to locate the end , -i 20 of the first color highlighted portion. Similarly, indicator members72c and 72d are moved in slot 74c and 74d, respectively, ~ ~ so as to locate the start and stop of the next color highlighting $` portion.
. :
In the embodiment, illustrated in Figure 2, only four indicator members are shown for creating two color high-lighting portions. It will be obvious to one skilled in the ~; art that any number of indicator members may be employed so as ~ to create any number of color highlighting portions. However, 'J~i' ' one should note that a corresponding number of developer units would be required, each developer unit being associated with :J
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~` its corresponding color highlighting portion. The structure .~ .
by which the indicator members actuate the electroluminescent panel will be described hereinafter with reference to Figure 3.
Referring now to Figure 3, each indicator member 72 has a magnet 80 disposed beneath support member 70. Magnet 80 actuates reed switch 82 mounted on lamp carriage 84 of lamp assembly 26. Reed switch 82 is connected to electrical circuitry ~,- 86 adapted to actuate power supply 88 at the appropriate time.Power supply 88 excites electroluminescent panel 28. Circuit 86 may be a suitable timing circuit so as to actuate power ;~ supply 88 at the appropriate time. Circuit 86 will also contain, ~; two channels. The first channel is adapted to excite power supply 88 such that electroluminescent panel 28 or erase lamp 28 is actuated to project light rays onto photoconductive ; 15 surface 12 to erase those portions of the electrostatic latent image corresponding to the black portions thereof. For example, ,,:
;J~ erase lamp 28 will be actuated so as to project light rays ontophotoconductive surface 12 after the electrostatic latent image -~, corresponding to the entire original document is recorded thereon.
~? 20 Erase lamp 28 will be actuated at the appropriate time and only ` `~ remain on a sufficient time so as to erase those portions of .-;- the electrostatic latent image encompassed by the start and stop indicator members. For example, if the original document con-tains thirty lines the electrostatic latent image formed on photoconductive surface 12 will also contain thirty lines. How-~-~ ever, if the first ten lines are to be reproduced in color, the start indicator member 72a will be disposed at line one and the stop indicator member 72b will be disposed at line ten.
Erase lamp 28 will only be actuated so as to erase lines ten :, ~
~ ~ 30 through thirty of the electrostatic latent image. Thus, the ~,~- ', ~- - 13 -~ :' ' ~-.... . .
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electrostatic latent image formed on photoconductive surface 12 will correspond to lines one through ten. The foregoing is controlled by circuitry 86. A second electrostatic latent .
image of the original document is then recorded on photocon-; 5 ductive surface 12. However, at this time, the second channel of circuitry 86 is actuated. This channel actuates electro-t' ` ~ luminescent panel 28 so as to erase those portions of the ~`~ original document corresponding to the color highlighted i`~ portions of the copy. For example, if the original documentonce again has thirty lines, and the first ten lines are to be color highlighted, erase lamp 28 will be actuated so as to erase lines one through ten. Thus, the second electro-static latent image will correspond to those portions of the ~!,' original document being reproduced in black, i.e. lines tenthrough thirty, inclusive. The foregoing may be achieved ~:.
~, by controlling the speed of drum 10 and precisely locating ~` panel 28 relative to the lead edge of the electrostatic latent ~ image formed on drum 10. By controlling the angular velocity ,i of drum 10 and preselecting the position of the lead edge of the electrostatic latent image, electroluminescent panel 28 , ~; may be actuated at the appropriate time to erase those portions of the electrostatic latent image desired. While the present ` invention has been described such that the black portions are; initially erased from the electrostatic latent image of the ~` 25 original document and, thereafter, the color highlighted portions, one skilled in the art will appreciate that the ; -- present invention is not necessarily so limited and the reverse may also be true.
~ Referring now to Figure 4, the development system'- ; 30 of the Figure 1 electrophotographic printing machine and the ~ - 14 -.~
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color highlighting procedure will be described with reference thereto. In the formation of black portions of the copy, only developer unit 30 is positioned in contact with the electro-`` static latent image. Thus, after the color highlighted portions ~'' of the electrostatic latent image are erased from the electro-static latent image by electroluminescent panel 28, developer unit 30 deposits black toner particles onto the electrostatic latent image. Developer unit 30 pivots from a non-operative position wherein developer roll 90 is spaced from photocon-ductive surface 12 to an operative position wherein the brush of developer mix is in contact with the electrostatic latent . .
' image. In this manner, black toner particles are deposited ., on the electrostatic latent image. Thereafter, the next electro-~s static latent image of the color highlighted portions is developed with the appropriately colored toner particles. The actuation ''''t"'' of developer unit 32 having red particles therein or developer ~ unit 34 having cyan toner particles therein is controlled by ::
control panel 96. For example, if the first highlight selected ~- ' , .
is red, developer unit 32 will pivot into position so that , 20 developer roll 92 is positioned such that the developer mix ~,, .
thereof contacts the second electrostatic latent image or the ; color highlighting electrostatic latent image. Contrawise, if the blue highlight is selected, developer unit 34 is pivoted ` such that developer roll 94 with the developer mix thereon is ~' 25 positioned adjacent to photoconductive surface 12 so as to s enable the second electrostatic latent image to be developed with cyan toner particles. The selection of the appropriate color highlighting developer unit, i.e. red or cyan, is actuated ,: ,"
by electrical circuitry 98. Circuitry 98 contains two channels and the associate logic therefor. One channel actuates the -:
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red developer unit, i.e. developer unit 32, and the other channel actuates the cyan developer unit, i.e. developer unit 34, at the appropriate time. Thus, if the first highlight selected is red, developer unit 32 will initially be actuated.
Contrawise, if the first highlight is blue, developer unit 34 will be actuated. Similarly, if two highlights are actuated ~ one being in red and the other being in blue, initially r' developer unit 32 will be actuated to develop the first color ,'~ highlighting electrostatic latent image in red, and thereafter f 10 developer unit 34 will be actuated so as to develop the second color highlighting electrostatic latent image in cyan. The ~; reverse may also be true, if the circuitry is wired in that `` manner.
~.:
In recapitulation, the apparatus of the present j~ 15 invention permits an electrophotographic printing machine to ~'."' .
color highlight selected portions of a copy. In this process, ~: the operator selects those portions of the original document , .
to be color highlighted. A Eirst electrostatic latent image ' ~ is formed of the selected portions of the original document.
The selected electrostatic latent image is developed with ~: .
suitably colored toner particles and transferred to a sheet of support material. A second electrostatic latent image is ^ recorded on the photoconductive surface 12 corresponding to G
the non-selected portions of the original document. This t 25 electrostatic latent image is developed with black toner par-; ticles. These toner particles are then transferred to the support sheet in registration with the previously transferred color toner particles. This forms a toner powder image on the copy sheet in black with portions color highlighted. There-,~ .
after, the powder image is permanently affixed to the sheet ~: .
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of support material by the application of suitable heat thereto.
The resultant copy then corresponds to the original document with the exception that selected portions thereof are color highlighted in a preselected color. Hence, in the electro-photographic printing machine described heretofore a black `~`` and white copy may be created having portions thereof color : -` highlighted in a plurallty of selected colors.
~` Thus, it is apparent that it has been provided in accordance with the present invention, an electrophoto-~ 10 graphic printing machine that fully satisfies the objects, s~ aims and advantages set forth above. While this invention - has been disclosed in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications, ~s: ` and variations will be apparent to those skilled in the art s~j~ 15 in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications and '~ variations as fall within the spirit and broad scope of the appended claims.
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subject matter of the various of assemblies of the present invention.
Turning now to Figure 2, selecting means 24 is dis-~ closed therein in greater detail. Selecting means 24 includes ;:~
~ ~ 5 a substantially transparent, planar support member 70 having ,~ a plurality of indicator members 72 mounted slidably thereon.
Indicator member 72a is adjusted so as to indicate the start ;X of the first color highlighting portion. Indicator member 72b ;~` is adjusted so as to indicate the stop of the first color high-~; 10 lighting portion. Similarly, indicator members72c and 72d are 'r` adjusted to indicate the start and stop, respectively, of the second color highlighting portion. In order to slidably adjust indicator members 72, support member 70 has a plurality of sub-stantially parallel equally spaced slots 74 therein. In operation, original document 22 is disposed on support member 70 between - locator marks 75 and 76, respectively. Thereafter, indicator .
~- member 72a is moved in slot 74a so as to locate the start of ~; ~ the first color highlighted portion on the copy. Indicator ~` member 72b is also moved in slot 74b so as to locate the end , -i 20 of the first color highlighted portion. Similarly, indicator members72c and 72d are moved in slot 74c and 74d, respectively, ~ ~ so as to locate the start and stop of the next color highlighting $` portion.
. :
In the embodiment, illustrated in Figure 2, only four indicator members are shown for creating two color high-lighting portions. It will be obvious to one skilled in the ~; art that any number of indicator members may be employed so as ~ to create any number of color highlighting portions. However, 'J~i' ' one should note that a corresponding number of developer units would be required, each developer unit being associated with :J
J .
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~` its corresponding color highlighting portion. The structure .~ .
by which the indicator members actuate the electroluminescent panel will be described hereinafter with reference to Figure 3.
Referring now to Figure 3, each indicator member 72 has a magnet 80 disposed beneath support member 70. Magnet 80 actuates reed switch 82 mounted on lamp carriage 84 of lamp assembly 26. Reed switch 82 is connected to electrical circuitry ~,- 86 adapted to actuate power supply 88 at the appropriate time.Power supply 88 excites electroluminescent panel 28. Circuit 86 may be a suitable timing circuit so as to actuate power ;~ supply 88 at the appropriate time. Circuit 86 will also contain, ~; two channels. The first channel is adapted to excite power supply 88 such that electroluminescent panel 28 or erase lamp 28 is actuated to project light rays onto photoconductive ; 15 surface 12 to erase those portions of the electrostatic latent image corresponding to the black portions thereof. For example, ,,:
;J~ erase lamp 28 will be actuated so as to project light rays ontophotoconductive surface 12 after the electrostatic latent image -~, corresponding to the entire original document is recorded thereon.
~? 20 Erase lamp 28 will be actuated at the appropriate time and only ` `~ remain on a sufficient time so as to erase those portions of .-;- the electrostatic latent image encompassed by the start and stop indicator members. For example, if the original document con-tains thirty lines the electrostatic latent image formed on photoconductive surface 12 will also contain thirty lines. How-~-~ ever, if the first ten lines are to be reproduced in color, the start indicator member 72a will be disposed at line one and the stop indicator member 72b will be disposed at line ten.
Erase lamp 28 will only be actuated so as to erase lines ten :, ~
~ ~ 30 through thirty of the electrostatic latent image. Thus, the ~,~- ', ~- - 13 -~ :' ' ~-.... . .
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electrostatic latent image formed on photoconductive surface 12 will correspond to lines one through ten. The foregoing is controlled by circuitry 86. A second electrostatic latent .
image of the original document is then recorded on photocon-; 5 ductive surface 12. However, at this time, the second channel of circuitry 86 is actuated. This channel actuates electro-t' ` ~ luminescent panel 28 so as to erase those portions of the ~`~ original document corresponding to the color highlighted i`~ portions of the copy. For example, if the original documentonce again has thirty lines, and the first ten lines are to be color highlighted, erase lamp 28 will be actuated so as to erase lines one through ten. Thus, the second electro-static latent image will correspond to those portions of the ~!,' original document being reproduced in black, i.e. lines tenthrough thirty, inclusive. The foregoing may be achieved ~:.
~, by controlling the speed of drum 10 and precisely locating ~` panel 28 relative to the lead edge of the electrostatic latent ~ image formed on drum 10. By controlling the angular velocity ,i of drum 10 and preselecting the position of the lead edge of the electrostatic latent image, electroluminescent panel 28 , ~; may be actuated at the appropriate time to erase those portions of the electrostatic latent image desired. While the present ` invention has been described such that the black portions are; initially erased from the electrostatic latent image of the ~` 25 original document and, thereafter, the color highlighted portions, one skilled in the art will appreciate that the ; -- present invention is not necessarily so limited and the reverse may also be true.
~ Referring now to Figure 4, the development system'- ; 30 of the Figure 1 electrophotographic printing machine and the ~ - 14 -.~
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color highlighting procedure will be described with reference thereto. In the formation of black portions of the copy, only developer unit 30 is positioned in contact with the electro-`` static latent image. Thus, after the color highlighted portions ~'' of the electrostatic latent image are erased from the electro-static latent image by electroluminescent panel 28, developer unit 30 deposits black toner particles onto the electrostatic latent image. Developer unit 30 pivots from a non-operative position wherein developer roll 90 is spaced from photocon-ductive surface 12 to an operative position wherein the brush of developer mix is in contact with the electrostatic latent . .
' image. In this manner, black toner particles are deposited ., on the electrostatic latent image. Thereafter, the next electro-~s static latent image of the color highlighted portions is developed with the appropriately colored toner particles. The actuation ''''t"'' of developer unit 32 having red particles therein or developer ~ unit 34 having cyan toner particles therein is controlled by ::
control panel 96. For example, if the first highlight selected ~- ' , .
is red, developer unit 32 will pivot into position so that , 20 developer roll 92 is positioned such that the developer mix ~,, .
thereof contacts the second electrostatic latent image or the ; color highlighting electrostatic latent image. Contrawise, if the blue highlight is selected, developer unit 34 is pivoted ` such that developer roll 94 with the developer mix thereon is ~' 25 positioned adjacent to photoconductive surface 12 so as to s enable the second electrostatic latent image to be developed with cyan toner particles. The selection of the appropriate color highlighting developer unit, i.e. red or cyan, is actuated ,: ,"
by electrical circuitry 98. Circuitry 98 contains two channels and the associate logic therefor. One channel actuates the -:
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red developer unit, i.e. developer unit 32, and the other channel actuates the cyan developer unit, i.e. developer unit 34, at the appropriate time. Thus, if the first highlight selected is red, developer unit 32 will initially be actuated.
Contrawise, if the first highlight is blue, developer unit 34 will be actuated. Similarly, if two highlights are actuated ~ one being in red and the other being in blue, initially r' developer unit 32 will be actuated to develop the first color ,'~ highlighting electrostatic latent image in red, and thereafter f 10 developer unit 34 will be actuated so as to develop the second color highlighting electrostatic latent image in cyan. The ~; reverse may also be true, if the circuitry is wired in that `` manner.
~.:
In recapitulation, the apparatus of the present j~ 15 invention permits an electrophotographic printing machine to ~'."' .
color highlight selected portions of a copy. In this process, ~: the operator selects those portions of the original document , .
to be color highlighted. A Eirst electrostatic latent image ' ~ is formed of the selected portions of the original document.
The selected electrostatic latent image is developed with ~: .
suitably colored toner particles and transferred to a sheet of support material. A second electrostatic latent image is ^ recorded on the photoconductive surface 12 corresponding to G
the non-selected portions of the original document. This t 25 electrostatic latent image is developed with black toner par-; ticles. These toner particles are then transferred to the support sheet in registration with the previously transferred color toner particles. This forms a toner powder image on the copy sheet in black with portions color highlighted. There-,~ .
after, the powder image is permanently affixed to the sheet ~: .
" -, :` , :~
of support material by the application of suitable heat thereto.
The resultant copy then corresponds to the original document with the exception that selected portions thereof are color highlighted in a preselected color. Hence, in the electro-photographic printing machine described heretofore a black `~`` and white copy may be created having portions thereof color : -` highlighted in a plurallty of selected colors.
~` Thus, it is apparent that it has been provided in accordance with the present invention, an electrophoto-~ 10 graphic printing machine that fully satisfies the objects, s~ aims and advantages set forth above. While this invention - has been disclosed in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications, ~s: ` and variations will be apparent to those skilled in the art s~j~ 15 in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications and '~ variations as fall within the spirit and broad scope of the appended claims.
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Claims (8)
1. A method of forming a copy of an original document with portions of the copy being highlighted in at least one color other than the remainder thereof, including the steps of:
placing the original document on a reproduction machine;
indicating portions of the original document to be reproduced in at least a first color with the remainder of the copy being in a second color; and activating the reproducing machine to reproduce the original document so that the copy has the indicated portions in at least the first color with the remainder thereof in the second color.
placing the original document on a reproduction machine;
indicating portions of the original document to be reproduced in at least a first color with the remainder of the copy being in a second color; and activating the reproducing machine to reproduce the original document so that the copy has the indicated portions in at least the first color with the remainder thereof in the second color.
2. A method of forming a copy of an original document with portions of the copy being highlighted in at least one color other than the remainder thereof, including the steps of:
positioning the original document on a substantially transparent support member;
adjusting an indicator mounted movably on the support member so as to define the portions of the original document being reproduced in at least the first color with the remainder thereof being reproduced in the second color; and reproducing the original document so that the copy has the selected portions in at least the first color with the remainder thereof in the second color.
positioning the original document on a substantially transparent support member;
adjusting an indicator mounted movably on the support member so as to define the portions of the original document being reproduced in at least the first color with the remainder thereof being reproduced in the second color; and reproducing the original document so that the copy has the selected portions in at least the first color with the remainder thereof in the second color.
3. An apparatus for forming at least a two color copy from a single color original document, including:
a support member arranged to hold the original document thereon;
means for adjustably indicating a portion of the original document to be copied in a first color and a portion of the original document to be copied in a second color;
circuit means coupled to said indicating means for producing a signal defining the portions of the original document to be copied in the first color and the second color;
and means, responsive to the signal from said circuit means, for reproducing the original document with the portions of the copy corresponding to the indicated portions of the original document being formed in the first and second colors.
a support member arranged to hold the original document thereon;
means for adjustably indicating a portion of the original document to be copied in a first color and a portion of the original document to be copied in a second color;
circuit means coupled to said indicating means for producing a signal defining the portions of the original document to be copied in the first color and the second color;
and means, responsive to the signal from said circuit means, for reproducing the original document with the portions of the copy corresponding to the indicated portions of the original document being formed in the first and second colors.
4. An apparatus as recited in claim 3, wherein said reproducing means includes an electrophotographic printing machine.
5. An apparatus as recited in claim 4, wherein said electrophotographic printing machine includes:
a photoconductive member;
means for charging said photoconductive member to a substantially uniform potential;
exposure means for projecting at least two light images of the original document onto said charged photoconductive member recording at least two electrostatic latent images thereon corresponding to the original document;
means for erasing the portion of the first latent image to be reproduced in the second color and for erasing the portion of the second latent image to be reproduced in the first color;
means for developing the unerased portion of the first latent image with toner particles of the first color and the unerased portion of the second latent image with toner particles of the second color;
means for transferring the first color toner particles and the second color toner particles to a common copy sheet;
and means for affixing substantially permanently the first and second color toner particles to the copy sheet forming a two color copy from a single color original document.
a photoconductive member;
means for charging said photoconductive member to a substantially uniform potential;
exposure means for projecting at least two light images of the original document onto said charged photoconductive member recording at least two electrostatic latent images thereon corresponding to the original document;
means for erasing the portion of the first latent image to be reproduced in the second color and for erasing the portion of the second latent image to be reproduced in the first color;
means for developing the unerased portion of the first latent image with toner particles of the first color and the unerased portion of the second latent image with toner particles of the second color;
means for transferring the first color toner particles and the second color toner particles to a common copy sheet;
and means for affixing substantially permanently the first and second color toner particles to the copy sheet forming a two color copy from a single color original document.
6. An apparatus as recited in claim 5, wherein said indicating means includes:
a plurality of tab members mounted slidably on said support member closely adjacent to the side edge of the original document, a pair of said tab members being positioned to indicate the portion of the original document being reproduced in the first color; and a plurality of magnetic members, each of said magnetic members being secured to each of said tab members.
a plurality of tab members mounted slidably on said support member closely adjacent to the side edge of the original document, a pair of said tab members being positioned to indicate the portion of the original document being reproduced in the first color; and a plurality of magnetic members, each of said magnetic members being secured to each of said tab members.
7. An apparatus as recited in claim 6, wherein said circuit means includes:
a voltage source; and a switch coupling said voltage source to said erasing means, said switch being responsive to said magnetic member to connect electrically said voltage source to said erasing means, thereby energizing said erasing means.
a voltage source; and a switch coupling said voltage source to said erasing means, said switch being responsive to said magnetic member to connect electrically said voltage source to said erasing means, thereby energizing said erasing means.
8. An apparatus as recited in claim 7, wherein said erasing means includes a light source to illuminate and discharge the portion of the latent image being erased.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US456090A US3914043A (en) | 1974-03-29 | 1974-03-29 | Color accenting copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1061852A true CA1061852A (en) | 1979-09-04 |
Family
ID=23811373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA219,648A Expired CA1061852A (en) | 1974-03-29 | 1975-02-07 | Color accenting copying machine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3914043A (en) |
| CA (1) | CA1061852A (en) |
| DE (1) | DE2507881A1 (en) |
| FR (1) | FR2266198A1 (en) |
| GB (1) | GB1496815A (en) |
| NL (1) | NL7501327A (en) |
Families Citing this family (63)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2548836A1 (en) * | 1975-10-30 | 1977-05-05 | Gerhard Ritzerfeld | XEROGRAPHIC OR ELECTROSTATIC COPY DEVICE |
| US4794421A (en) * | 1983-05-12 | 1988-12-27 | Eastman Kodak Company | Apparatus and method for electrophotographically producing copies from originals having continuous-tone and other content |
| DE3517383C2 (en) * | 1984-05-15 | 1996-04-25 | Canon Kk | Copier |
| DE3517397C2 (en) * | 1984-05-15 | 1997-04-10 | Canon Kk | Electrophotographic copier |
| US4825250A (en) * | 1984-08-30 | 1989-04-25 | Canon Kabushiki Kaisha | Image forming apparatus including exposure scanning means |
| JPS6170564A (en) * | 1984-09-14 | 1986-04-11 | Toshiba Corp | Image forming device |
| DE3605472C2 (en) * | 1985-02-21 | 1995-05-11 | Canon Kk | Electrophotographic copier |
| JPS61272765A (en) * | 1985-05-28 | 1986-12-03 | Toshiba Corp | Image forming device |
| DE3645271C2 (en) * | 1985-11-18 | 2001-06-07 | Canon Kk | Coordinate input system for copier |
| DE3650722T2 (en) * | 1985-11-18 | 1999-12-09 | Canon Kk | Imaging device |
| DE3639351C2 (en) * | 1985-11-18 | 1994-04-14 | Canon Kk | Copier |
| US4777510A (en) * | 1986-12-11 | 1988-10-11 | Eastman Kodak Company | Copying apparatus and method with editing and production control capability |
| WO1987003707A1 (en) * | 1985-12-16 | 1987-06-18 | Eastman Kodak Company | Copying apparatus and method with editing and production control capability |
| US4887129A (en) * | 1986-05-12 | 1989-12-12 | Shenoy Vittal U | Editing copying machine |
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| JPH02132257U (en) * | 1989-04-11 | 1990-11-02 | ||
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| JPH04106563A (en) * | 1990-08-27 | 1992-04-08 | Minolta Camera Co Ltd | Copying machine |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3117488A (en) * | 1960-04-12 | 1964-01-14 | Itt | Color pattern display system |
| US3532422A (en) * | 1966-07-14 | 1970-10-06 | Electroprint Inc | Method and apparatus for electrostatic color reproduction |
| AU419178B2 (en) * | 1966-10-18 | 1971-11-25 | Archie Ramsden. Grace | Method of and means for producing electrophotographic copies |
-
1974
- 1974-03-29 US US456090A patent/US3914043A/en not_active Expired - Lifetime
-
1975
- 1975-02-04 NL NL7501327A patent/NL7501327A/en unknown
- 1975-02-07 CA CA219,648A patent/CA1061852A/en not_active Expired
- 1975-02-24 DE DE19752507881 patent/DE2507881A1/en active Pending
- 1975-03-26 FR FR7509415A patent/FR2266198A1/fr not_active Withdrawn
- 1975-03-27 GB GB12944/75A patent/GB1496815A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL7501327A (en) | 1975-04-29 |
| US3914043A (en) | 1975-10-21 |
| FR2266198A1 (en) | 1975-10-24 |
| GB1496815A (en) | 1978-01-05 |
| DE2507881A1 (en) | 1975-10-02 |
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