CA1289410C - Braille printing plate - Google Patents
Braille printing plateInfo
- Publication number
- CA1289410C CA1289410C CA000553341A CA553341A CA1289410C CA 1289410 C CA1289410 C CA 1289410C CA 000553341 A CA000553341 A CA 000553341A CA 553341 A CA553341 A CA 553341A CA 1289410 C CA1289410 C CA 1289410C
- Authority
- CA
- Canada
- Prior art keywords
- braille
- board
- dot
- male part
- balls
- 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
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- Printing Methods (AREA)
Abstract
ABTRACT
A braille printing plate comprising a male part having braille characters formed by balls and a female part to be used in combination with the male part and having dot receptacle holes formed by copying the braille characters of the male part.
The male part comprises a braille printed sheet having dot holes loaded with the balls which are thereafter secured thereto. The female part is formed with dot receptacle holes by copying the braille characters of the male part.
A braille printing plate comprising a male part having braille characters formed by balls and a female part to be used in combination with the male part and having dot receptacle holes formed by copying the braille characters of the male part.
The male part comprises a braille printed sheet having dot holes loaded with the balls which are thereafter secured thereto. The female part is formed with dot receptacle holes by copying the braille characters of the male part.
Description
1289~1~
The present invention relates to a braille printing plate. Although it is known that a braille writing instrument or braillewriter is used for braille printing, the present inventor developed a braille printing plate which can print braille without using the braillewriter, etc. and can be stored for a long time as a master plate, as disclosed in European Patent Publication No. 169959.
In the above invention, braille is printed with use of a punched plate made of hard plastic, etc. having all rows punched with dot holes, six of which correspond to one braille letter. On one surface of the punched plate is pasted a ball retaining sheet such as vinyl chloride sheet and on the other surface is pasted a dot hole sheet. The braille-forming dot holes are punched in the dot hole sheet with a stylus or braillewriter so as to project the ball retaining sheet outwardly, and then balls are loaded in recessions formed in the ball retaining sheet, and thereafter a sheet is pasted on the dot hole aheet to provide a stable support for the balls.
Thus, braille letters are formed and a master printing plate is obtained.
The above prior art using balls to form letters on the master printing plate is advantageous in that the braille letters will not be defaced even if printing is repeated. The printed braille letters are easy to read. Theto three sheets can be clearly printed at one time. Theballs can be taken out after printing and economically. The balls and punched plate aré available for repeated use The braillewriters are a little different in the braille size or the line spacing according to manufacturers. If the master plate is to be made using the braillewriter, the punched plate requires to register with the braillewriter in the braille spacing. The prior art proposed by the ~2~399~0 inventor was suitable for producing the master plate with a stylus, but it faced with the aforementioned problems, though not defective, when using the braille-writer.
Recently, there has been developed a computer-aided braille ~rf~ng machine, in which ordinary letters are put-in and computerized so as to print braille letters. Advantageously, a person without knowledge of braille can operate on this machine.
Further, data can be recorded in floppy disk and duplicated easily. The convenience of this machine is incomparable with the conventional braillewriter, but this braille writing machine and associated braille printer are so expensive that it actually makes difficult for even a braille library to purchase them.
Accordingly, an object of the present invention is to solve the prior art problems and to provide a printing master plate which can print braille letters and eliminate the necessity of using the punched plate with all rows punched with dot holes.
The master plate of the present invention is provided by forming braille letters directly on a board such as cardboard with a braillewriter and loading balls in braille-forming recessions appearing on the rear side of the board. Alternatively, the master plate is provided by loading balls in recessions formed on the rear side of a braille-printed sheet and then pasting it on a master board. The ball-loaded board is a male counterpart of the master plate, which is used in combination with a female counterpart having recesssions that are formed in a board by copying the raised portions of the male counterpart.
The male and female parts of the master plate are openably binded at the lateral edges thereof.
12~94~10 With a paper between the male and female parts, they will be pressed between rollers of a braille printing machine so as to print braille on the paper by means Gf the ball-containing projections formed on the male part. Further, if a rotary press type print machine is used to print braille, the male part is attached on one roller while the female part is attached on the other roller at the position registering with the male part. In this case, papers can be supplied continuously and therefore printing efficiency will be improved.
Further, it is possible to print both surfaces of the paper by arranging projections and recessions with an appropriate spacing on the printing plate so that they appear every other line.
Although the present invention uses the braille-writer to strike braille letters or uses the braille-printed sheet printed by the braille printer, it is also possible to use the conventional braille writing instrument to make the male plate.
According to a broad aspect of the present inven-tion there is provided a braille printing plate which comprises a male part including a first board having dot holes selectively formed therein only at locations defining data to be printed in the form of braille characters. A
deformable plastic film is fixed to the first board and covers one side of the first board. Balls are provided in all of the dot holes projecting outwardly so as to deform the film outwardly therewith. The film thereby has an exterior surface having projecting portions corresponding to the locations of the balls defining raised braille characters.
A female part includes a second board having dot hole recep-ta~les in one-to-one correspondence with the projecting portions directly opposing and shaped to respective ones of the projecting portions, whereby a sheet placed between the male part and the female part will have the raised braille characters printed thereon by pressing the female part and the male part together such that the projecting portions are received in the opposing dok hole receptacles.
B
.. .
..
~289~0 According to a further broad aspect of the present invention there is provided a braille printing plate which comprises a male part including a braille printing sheet having first and second opposite sides. The braille printed sheet has dot holes only at selected locations defining data to be printed in the form of braille characters, projecting outwardly on the first side and open on the second side.
Balls are loaded in all of the hGles and a board is fixed to the second side 50 as to cover the dot holes. The second side thereby has projecting portions corresponding to the locations of the balls and defines raised braille characters.
A female part is also provided and has dot hole receptacles in one-to-one correspondence with the projecting portions directly opposing and shaped -to respective ones of the projecting portions, whereby a sheet placed between the male part and the female par~ will have the raised braille charac-ters printed thereon by pressing the female part and the male part together such that the projecting portions are received in the opposing dot hole receptacles.
B
lZ~9f~
FIGURES 1 to 3 illustrate a master plate for one-surface printing;
FIGURE 1 shows a perspective view of male and female parts;
FIGURE 2A shows a sectional view of the male part;
FIGURE 2B shows a sectional view of the female part to be used in combination with the male part of Figure 2A; and FIGURE 3 shows a perspective view of the male and female parts connected together.
FIGURE 4A shows a sectional view of a part of a master plate for both-surface printing;
FIGURE 4B shows a sectional view of a counterpart to be used in combination with the part shown in Figure 4A;
FIGURE 5 shows a sectional view of components for making a male part according to another embodiment;
FIGURE 6A shows a sectional vlew of the male part formed as shown in Figure 5; and FIGURE 6B shows a sectional view of a female part to be used in combination with the male part of Figure 6A.
The present invention provides one-surface printing and both-surface printing. First, the ;one-surface printing will be described. The master plate for one-surface printing comprises a pair ~ ::
~ :
D
.~:
. ~
~9~o of male and female parts, 1 and 2, which are openably connected by a binding cloth 3 as shown in Figure 3.
As shown in Figure 2, the male part 1 includes a board 10 such as cardboard, on one surface of which is pasted a soft plastic film 11 such as a polyethylene film. With this film 11 below, dot holes 12 are punched in the board 10 with use of a braille writing instrument or braillewriter, not shown.
Balls 13 made of steel or the like are loaded in the dot holes 12 and then a plastic film 15 is pasted on the surface from which the balls 13 are inserted, so as to form braille characters 14 on the board 10.
Thus, the male part 1 is formed with the ball-containing braille characters 14, which can be read from the back.
Further, the female part 2 uses a board thicker than that of the male part. The male and female parts, 1 and 2, are superposed with the braille characters 14 inside, and are connected by a binding cloth 3 attached at the lateral edges thereof.
The male and female parts, 1 and 2, are pressed against each other so that the female part 2 is formed with braille receptacle holes 22 copied from the braille characters 14 of the male part 1.
- ; Although the female part 2 of the embodiment comprises two boards, 20 and 21, it is unnecessary to use the pasted one if the board is of a thickness capable of forming the braille receptacle hole 22.
Printing is made by pressing the male and female parts, 1 and 2, by pressure rollers of a print machine, with a paper held between the male and female parts. Hemisperical projections formed , - ' 12~394~C~
as braille characters 14 on the male part 1 are copied on the paper between the male and female parts 1 and 2, and braille is printed on the paper.
The braille printed on the paper is easy to rea~
if printed one by one/ but it is also possible to print two to three papers at one time.
After printing is completed, it is possible to store the master plate to be used at any desired time. If there is no need for the master plate, the boards cannot be recycled but the balls are available for repeated use.
Next, the both-surface printing will be described.
The master plate for the both-surface printing is provided with the braille receptacle holes between rows of the braille characters. In this case, the master plate has the structure that the male and female parts are the same in structure.
Referring to Figure 4, a first part 100 of the master plate includes a board 101 and a plastic film 102 pasted thereon. Dot holes 103 are formed toward the film surface, and balls 104 are inserted in the dot holes 103 to form braille characters 105. Further, a second part 200 of the master plate which is a counterpart of the first part similarly includes a board 201 and a film 202 pasted thereon.
In the similar manner with the first part, dot holes 203 are formed between the rows of the braille characters lO5,,and balls 204 are inserted in the dot holes 203 to form braille characters 205.
~ fter boards, 106 and 206, are superposed on the outer surfaces of the boards, 101 and 201, respectively, both parts 100 and 200 are joined and pressed against each other, so as to copy the projections of the braille characters 105 and 205 onto the opposite boards and form braille receptable holes 107 and 207, respectively.
1289410 -:
The above parts 100 and 200 are attached by a binding cloth in an openable manner, and to print braille, they are pressed with a paper between the surfaces formed with the braille characters 105 and 205.
In the experiment made by the inventor, he used a 0.4mm-thick board 10, 20 constituting the master plate, a 0.07mm-thick soft plastic film 11 for covering the surface of balls 13, each ball being made of steel and 1.2mm in diameter, and other materials of appropriate thickness in order to make the braille master plate. The braille character 14 had a height of 0.6mm, and with use of this master plate, the braille printed on a paper could be more than 0.5mm high which makes the braille easy to read.
In case of the master plate for both-surface printing, the board used for holding the balls 104 and 204 was of 0.3mm thickness, and the board superposed on the outside thereof was of 0.4mm thickness.
The embodiment as shown in Figures 5 and 6 uses a braille-printed sheet printed by a braille printer. A male part 30 of the master plate includes such braille-printed sheet 31, which has dot holes 32 to be loaded with balls 13 and is pasted with the board 10. Further, the printing surface, namely the surface where the balls 13 project from the board 10, is pasted with the soft plastic film 11 so as to form the braille characters 14.
The female part 33 of the master plate is made of a board in the similar manner with the male part 30 and has a thickness capable of forming dot receptacle holes 34 corresponding to the raised portions of the braille characters 14.
~, .:
~899~
The braille-printed sheet 31 may be relatively thin paper for ordinary use in a printer for computer.
As the purpose of the braille-printed sheet 31 is not to be read as itself but to be loaded with --balls in the dot holes 32 thereof and then pasted with a board, the easily available paper for computer -`
will be sufficient and economical. ;
In the similar method with the structure shown in Figure 3, the braille characters on the -male part 30 are copied onto the female part 33 and these male and female parts are connected by , a binding cloth to make them suitable for printing.
Although the master plate as shown in Figure 6 is for one-surface printing, it is also possible~
to make a both-surface printing master plate according to the embodiment shown in Figures 5 and 6.
'. ' , ~ . .' ' :: '- ''
The present invention relates to a braille printing plate. Although it is known that a braille writing instrument or braillewriter is used for braille printing, the present inventor developed a braille printing plate which can print braille without using the braillewriter, etc. and can be stored for a long time as a master plate, as disclosed in European Patent Publication No. 169959.
In the above invention, braille is printed with use of a punched plate made of hard plastic, etc. having all rows punched with dot holes, six of which correspond to one braille letter. On one surface of the punched plate is pasted a ball retaining sheet such as vinyl chloride sheet and on the other surface is pasted a dot hole sheet. The braille-forming dot holes are punched in the dot hole sheet with a stylus or braillewriter so as to project the ball retaining sheet outwardly, and then balls are loaded in recessions formed in the ball retaining sheet, and thereafter a sheet is pasted on the dot hole aheet to provide a stable support for the balls.
Thus, braille letters are formed and a master printing plate is obtained.
The above prior art using balls to form letters on the master printing plate is advantageous in that the braille letters will not be defaced even if printing is repeated. The printed braille letters are easy to read. Theto three sheets can be clearly printed at one time. Theballs can be taken out after printing and economically. The balls and punched plate aré available for repeated use The braillewriters are a little different in the braille size or the line spacing according to manufacturers. If the master plate is to be made using the braillewriter, the punched plate requires to register with the braillewriter in the braille spacing. The prior art proposed by the ~2~399~0 inventor was suitable for producing the master plate with a stylus, but it faced with the aforementioned problems, though not defective, when using the braille-writer.
Recently, there has been developed a computer-aided braille ~rf~ng machine, in which ordinary letters are put-in and computerized so as to print braille letters. Advantageously, a person without knowledge of braille can operate on this machine.
Further, data can be recorded in floppy disk and duplicated easily. The convenience of this machine is incomparable with the conventional braillewriter, but this braille writing machine and associated braille printer are so expensive that it actually makes difficult for even a braille library to purchase them.
Accordingly, an object of the present invention is to solve the prior art problems and to provide a printing master plate which can print braille letters and eliminate the necessity of using the punched plate with all rows punched with dot holes.
The master plate of the present invention is provided by forming braille letters directly on a board such as cardboard with a braillewriter and loading balls in braille-forming recessions appearing on the rear side of the board. Alternatively, the master plate is provided by loading balls in recessions formed on the rear side of a braille-printed sheet and then pasting it on a master board. The ball-loaded board is a male counterpart of the master plate, which is used in combination with a female counterpart having recesssions that are formed in a board by copying the raised portions of the male counterpart.
The male and female parts of the master plate are openably binded at the lateral edges thereof.
12~94~10 With a paper between the male and female parts, they will be pressed between rollers of a braille printing machine so as to print braille on the paper by means Gf the ball-containing projections formed on the male part. Further, if a rotary press type print machine is used to print braille, the male part is attached on one roller while the female part is attached on the other roller at the position registering with the male part. In this case, papers can be supplied continuously and therefore printing efficiency will be improved.
Further, it is possible to print both surfaces of the paper by arranging projections and recessions with an appropriate spacing on the printing plate so that they appear every other line.
Although the present invention uses the braille-writer to strike braille letters or uses the braille-printed sheet printed by the braille printer, it is also possible to use the conventional braille writing instrument to make the male plate.
According to a broad aspect of the present inven-tion there is provided a braille printing plate which comprises a male part including a first board having dot holes selectively formed therein only at locations defining data to be printed in the form of braille characters. A
deformable plastic film is fixed to the first board and covers one side of the first board. Balls are provided in all of the dot holes projecting outwardly so as to deform the film outwardly therewith. The film thereby has an exterior surface having projecting portions corresponding to the locations of the balls defining raised braille characters.
A female part includes a second board having dot hole recep-ta~les in one-to-one correspondence with the projecting portions directly opposing and shaped to respective ones of the projecting portions, whereby a sheet placed between the male part and the female part will have the raised braille characters printed thereon by pressing the female part and the male part together such that the projecting portions are received in the opposing dok hole receptacles.
B
.. .
..
~289~0 According to a further broad aspect of the present invention there is provided a braille printing plate which comprises a male part including a braille printing sheet having first and second opposite sides. The braille printed sheet has dot holes only at selected locations defining data to be printed in the form of braille characters, projecting outwardly on the first side and open on the second side.
Balls are loaded in all of the hGles and a board is fixed to the second side 50 as to cover the dot holes. The second side thereby has projecting portions corresponding to the locations of the balls and defines raised braille characters.
A female part is also provided and has dot hole receptacles in one-to-one correspondence with the projecting portions directly opposing and shaped -to respective ones of the projecting portions, whereby a sheet placed between the male part and the female par~ will have the raised braille charac-ters printed thereon by pressing the female part and the male part together such that the projecting portions are received in the opposing dot hole receptacles.
B
lZ~9f~
FIGURES 1 to 3 illustrate a master plate for one-surface printing;
FIGURE 1 shows a perspective view of male and female parts;
FIGURE 2A shows a sectional view of the male part;
FIGURE 2B shows a sectional view of the female part to be used in combination with the male part of Figure 2A; and FIGURE 3 shows a perspective view of the male and female parts connected together.
FIGURE 4A shows a sectional view of a part of a master plate for both-surface printing;
FIGURE 4B shows a sectional view of a counterpart to be used in combination with the part shown in Figure 4A;
FIGURE 5 shows a sectional view of components for making a male part according to another embodiment;
FIGURE 6A shows a sectional vlew of the male part formed as shown in Figure 5; and FIGURE 6B shows a sectional view of a female part to be used in combination with the male part of Figure 6A.
The present invention provides one-surface printing and both-surface printing. First, the ;one-surface printing will be described. The master plate for one-surface printing comprises a pair ~ ::
~ :
D
.~:
. ~
~9~o of male and female parts, 1 and 2, which are openably connected by a binding cloth 3 as shown in Figure 3.
As shown in Figure 2, the male part 1 includes a board 10 such as cardboard, on one surface of which is pasted a soft plastic film 11 such as a polyethylene film. With this film 11 below, dot holes 12 are punched in the board 10 with use of a braille writing instrument or braillewriter, not shown.
Balls 13 made of steel or the like are loaded in the dot holes 12 and then a plastic film 15 is pasted on the surface from which the balls 13 are inserted, so as to form braille characters 14 on the board 10.
Thus, the male part 1 is formed with the ball-containing braille characters 14, which can be read from the back.
Further, the female part 2 uses a board thicker than that of the male part. The male and female parts, 1 and 2, are superposed with the braille characters 14 inside, and are connected by a binding cloth 3 attached at the lateral edges thereof.
The male and female parts, 1 and 2, are pressed against each other so that the female part 2 is formed with braille receptacle holes 22 copied from the braille characters 14 of the male part 1.
- ; Although the female part 2 of the embodiment comprises two boards, 20 and 21, it is unnecessary to use the pasted one if the board is of a thickness capable of forming the braille receptacle hole 22.
Printing is made by pressing the male and female parts, 1 and 2, by pressure rollers of a print machine, with a paper held between the male and female parts. Hemisperical projections formed , - ' 12~394~C~
as braille characters 14 on the male part 1 are copied on the paper between the male and female parts 1 and 2, and braille is printed on the paper.
The braille printed on the paper is easy to rea~
if printed one by one/ but it is also possible to print two to three papers at one time.
After printing is completed, it is possible to store the master plate to be used at any desired time. If there is no need for the master plate, the boards cannot be recycled but the balls are available for repeated use.
Next, the both-surface printing will be described.
The master plate for the both-surface printing is provided with the braille receptacle holes between rows of the braille characters. In this case, the master plate has the structure that the male and female parts are the same in structure.
Referring to Figure 4, a first part 100 of the master plate includes a board 101 and a plastic film 102 pasted thereon. Dot holes 103 are formed toward the film surface, and balls 104 are inserted in the dot holes 103 to form braille characters 105. Further, a second part 200 of the master plate which is a counterpart of the first part similarly includes a board 201 and a film 202 pasted thereon.
In the similar manner with the first part, dot holes 203 are formed between the rows of the braille characters lO5,,and balls 204 are inserted in the dot holes 203 to form braille characters 205.
~ fter boards, 106 and 206, are superposed on the outer surfaces of the boards, 101 and 201, respectively, both parts 100 and 200 are joined and pressed against each other, so as to copy the projections of the braille characters 105 and 205 onto the opposite boards and form braille receptable holes 107 and 207, respectively.
1289410 -:
The above parts 100 and 200 are attached by a binding cloth in an openable manner, and to print braille, they are pressed with a paper between the surfaces formed with the braille characters 105 and 205.
In the experiment made by the inventor, he used a 0.4mm-thick board 10, 20 constituting the master plate, a 0.07mm-thick soft plastic film 11 for covering the surface of balls 13, each ball being made of steel and 1.2mm in diameter, and other materials of appropriate thickness in order to make the braille master plate. The braille character 14 had a height of 0.6mm, and with use of this master plate, the braille printed on a paper could be more than 0.5mm high which makes the braille easy to read.
In case of the master plate for both-surface printing, the board used for holding the balls 104 and 204 was of 0.3mm thickness, and the board superposed on the outside thereof was of 0.4mm thickness.
The embodiment as shown in Figures 5 and 6 uses a braille-printed sheet printed by a braille printer. A male part 30 of the master plate includes such braille-printed sheet 31, which has dot holes 32 to be loaded with balls 13 and is pasted with the board 10. Further, the printing surface, namely the surface where the balls 13 project from the board 10, is pasted with the soft plastic film 11 so as to form the braille characters 14.
The female part 33 of the master plate is made of a board in the similar manner with the male part 30 and has a thickness capable of forming dot receptacle holes 34 corresponding to the raised portions of the braille characters 14.
~, .:
~899~
The braille-printed sheet 31 may be relatively thin paper for ordinary use in a printer for computer.
As the purpose of the braille-printed sheet 31 is not to be read as itself but to be loaded with --balls in the dot holes 32 thereof and then pasted with a board, the easily available paper for computer -`
will be sufficient and economical. ;
In the similar method with the structure shown in Figure 3, the braille characters on the -male part 30 are copied onto the female part 33 and these male and female parts are connected by , a binding cloth to make them suitable for printing.
Although the master plate as shown in Figure 6 is for one-surface printing, it is also possible~
to make a both-surface printing master plate according to the embodiment shown in Figures 5 and 6.
'. ' , ~ . .' ' :: '- ''
Claims (6)
1. A braille printing plate, comprising:
a male part including a first board having dot holes selectively formed therein only at locations defining data to be printed in the form of braille characters, a deformable plastic film fixed to said first board and cover-ing one side of said first board, and balls in all of said dot holes projecting outwardly so as to deform said film outwardly therewith, said film thereby having an exterior surface having projecting portions corresponding to the locations of said balls defining raised braille characters;
and a female part including a second board having dot hole receptacles in one-to-one correspondence with said projecting portions directly opposing and shaped to respec-tive ones of said projecting portions, whereby a sheet placed between said male part and said female part will have the raised braille characters printed thereon by pressing said female part and said male part together such that said projecting portions are received in the opposing dot hole receptacles.
a male part including a first board having dot holes selectively formed therein only at locations defining data to be printed in the form of braille characters, a deformable plastic film fixed to said first board and cover-ing one side of said first board, and balls in all of said dot holes projecting outwardly so as to deform said film outwardly therewith, said film thereby having an exterior surface having projecting portions corresponding to the locations of said balls defining raised braille characters;
and a female part including a second board having dot hole receptacles in one-to-one correspondence with said projecting portions directly opposing and shaped to respec-tive ones of said projecting portions, whereby a sheet placed between said male part and said female part will have the raised braille characters printed thereon by pressing said female part and said male part together such that said projecting portions are received in the opposing dot hole receptacles.
2. A braille printing plate as in claim 1, further comprising a binding cloth openable connecting said female part and said male part.
3. A braille printing plate as in claim 1, further comprising means, disposed on a side of said first board opposite said one side, for retaining said balls in said dot holes.
4. A braille printing plate as in claim 1, wherein said first board is formed of cardboard.
5. A braille printing plate, comprising:
a male part including a braille printing sheet having first and second opposite sides, said braille printed sheet having dot holes only at selected locations defining data to be printed in the form of braille characters project-ing outwardly on said first side and open on said second side, balls loaded in all of said holes, and a board fixed to said second side so as to cover said dot holes, said second side thereby having projecting portions corresponding to the locations of said balls and defining raised braille characters; and a female part having dot hole receptacles in one-to-one correspondence with said projecting portions directly opposing and shaped to respective ones of said projecting portions, whereby a sheet placed between said male part and said female part will have the raised braille characters printed thereon by pressing said female part and said male part together such that said projecting portions are received in the opposing dot hole receptacles.
a male part including a braille printing sheet having first and second opposite sides, said braille printed sheet having dot holes only at selected locations defining data to be printed in the form of braille characters project-ing outwardly on said first side and open on said second side, balls loaded in all of said holes, and a board fixed to said second side so as to cover said dot holes, said second side thereby having projecting portions corresponding to the locations of said balls and defining raised braille characters; and a female part having dot hole receptacles in one-to-one correspondence with said projecting portions directly opposing and shaped to respective ones of said projecting portions, whereby a sheet placed between said male part and said female part will have the raised braille characters printed thereon by pressing said female part and said male part together such that said projecting portions are received in the opposing dot hole receptacles.
6. A braille printing plate as in claim 5, wherein said sheet is a paper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000553341A CA1289410C (en) | 1987-12-02 | 1987-12-02 | Braille printing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000553341A CA1289410C (en) | 1987-12-02 | 1987-12-02 | Braille printing plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1289410C true CA1289410C (en) | 1991-09-24 |
Family
ID=4136988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000553341A Expired - Lifetime CA1289410C (en) | 1987-12-02 | 1987-12-02 | Braille printing plate |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1289410C (en) |
-
1987
- 1987-12-02 CA CA000553341A patent/CA1289410C/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |