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1. (WO1989006599) APPARATUS FOR PRINTING BRAILLE IN PAPER
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

10
Claims

1. Apparatus for printing Braille in paper, comprising means for transporting paper, an elongated die, a carriage movable along the die and carrying a hammer with a printing head, and which at operating the hammer cooperates with the die for forming an embossment of a Braille
character in the paper, and a controlling unit, which, in accordance with signals representing letters and other characters, controls the carriage, the hammer and the means for transporting paper, characterized in that the die is provided with a row of substantially half-spherical
projections aligned with eachother and arranged in groups of two with intermediate distances in accordance with the horizontal intermediate distances between the embossments in Braille, and in that the printing head of the hammer has an indentation complementary to the projections.
2. Apparatus according to claim 1, characterized in that the controlling unit operates the means for
transporting paper to scroll the formed line of Braille characters to a reading position, of during a predetermined period no signals representing letters and similar
characters are received, while the controlling unit upon receipt of such signals operates the means for transporting paper to scroll the paper back into the original position.
3. Apparatus according to claim lor 2,
characterized in that the carriage is further provided with a printing unit for ordinary print.
4. Apparatus according to claims 1, 2 or 3,
characterized in that the die is provided with a second row of substantially semi-spherical aligned projections with intermediate distances of equal length, wherein the
controlling unit can, in accordance with signals
representing a geometric figure or the like, operate the carriage, the hammer and the means for transporting the paper to form Braille embossments which together form this shape.
5. Apparatus according to claim 4, characterized in that the intermediate distance between each two successive projections of the row of projections with equal intermediate distances corresponds with the vertical pitch between the embossments of a Braille character, wherein the controlling unit is made in such a manner that successive lines of text can be formed in the paper in the longitudinal direction thereof.
6. Apparatus according to claim 5 , characterized in that the carriage is provided with a second hammer with printing head, which has an indentation corresponding to the projections and which can cooperate with the second row of projections.
7. Apparatus according to one of the preceding claims, characterized in that the die is provided with a row of substantially semi-spherical indentations aligned with eachother and arranged in groups of two with intermediate distances corresponding to the intermediate distances of the embossments in Braille, wherein each group of two
indentations is displaced over half a pitch between the embossments of a Braille character as compared to the projections, wherein the carriage is provided with a second hammer with printing head, which has a projection
corresponding to the indentations, and wherein the
controlling unit is made in such a manner that Braille characters to be formed optionally on the side of the paper facing away from the hammers, are formed simultaneously with the forming of Braille characters on the side of the paper facing the hammers.
8. Apparatus according to claim 7 , characterized in that the vertical intermediate distance between the row of projections and the row of indentations of the die equals 1,5 times the vertical pitch between the embossments of a Braille character.