US3457855A - High speed belt or chain printer with coordinated paper feed means - Google Patents

High speed belt or chain printer with coordinated paper feed means Download PDF

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Publication number
US3457855A
US3457855A US656874A US65687467A US3457855A US 3457855 A US3457855 A US 3457855A US 656874 A US656874 A US 656874A US 65687467 A US65687467 A US 65687467A US 3457855 A US3457855 A US 3457855A
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line
printing
print
type
high speed
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US656874A
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English (en)
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Emilio Falchero
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/20—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on endless bands or the like
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/16—Means for paper feeding or form feeding

Definitions

  • the present invention relates to high speed printers, of the model wherein the type members are carried by an endless chain or ribbon, moving in a direction parallel to the print line and known as chain or belt printers.
  • High speed printers in which the type members are horizontally aligned on a continuously moving endless ribbon or chain member and carried in a direction parallel to the print line, with the type members cooperating with a multiplicity of actuators and with proper inking means to print selected characters on the paper or other printing medium are known.
  • the actuators are hammers which, when impelled by electromagnets, push the paper and the inking means (ink ribbon or carbon paper) against the type carried by the ribbon or the chain.
  • a hammer is located, at every printing position and a logical control device operates each electromagnet so that each hammer is actuated by the electromagnet when the type corresponding to the character to be printed passes in front of the hammer.
  • the printing is made on the fly, that is, without stopping the type-carrying member, thereby obtaining high printing speed.
  • the same principle may be applied to non-impact printing devices, wherein the printing is obtained by xerographic, photoelectric, thermoplastic or similar processes.
  • the type-carrying member is, for example, made of a flexible ribbon on which proper masks or patterns, related to the shape of the different characters to be printed are fixed
  • the actuator is a device which modifies a limited portion of a printing medium by means of a chemical, electrical, or any other non-mechanical action, the modifications causing, either immediate or subsequent, appearance of the shape of the character, either on the same medium or, after a transfer operation, on a final print support. Due to the absence of mechanical action, such printing means may attain very high speed.
  • One of the outstanding problems, connected with the designing and fabrication of printers of the described type, is to insure correct paper feeding, that is, to cause the printing medium to advance in a direction perpendicular to the printed line at the proper time and for the required distance.
  • the foregoing arrangement provides a device of great simplicity and reliability, permits the device to reach the maximum printing speed allowed by the printing process, and may be applied as well to mechanical printers as to non-impact printers, thereby, the speed limitation inherent to abrupt feeding of the printing support may be disregarded, thus offering big functional, constructive and economical advantages.
  • FIG. 1 represents a schematic elevation view of the device
  • FIG. 2 is a plan view of the same
  • FIG. 3 represents in detail a part of the device
  • FIG. 4 is a view of a section along plane IV-IV of FIG. 2 and FIG. 5 a partial view of a section along path BB of FIG. 4;
  • FIGS. 6 to 9 show possible variants in the arrangement of the set of characters
  • FIGS. 10 to 12 show the block diagram of corresponding register arrangements for controlling the actuators.
  • an endless type-carrying ribbon 1 is supported upon two rollers 2 and 3, which, under the action of motor means, not shown maintain the ribbon in steady motion in the direction indicated by the arrow.
  • the ribbon endless in the form of a ring, carries a row of type members 4 which are in the form of small blocks fixed to the ribbon; each one of the blocks carrying, on the external face, the relief of a shape corresponding to a symbol.
  • the row 4 comprises the set of letters, numerals and marks used with the printer.
  • the type members during their motion are in motion at a short distance from the rear face of the paper 5, which in FIG. 1 is cut out to show the types.
  • An inking means such as an ink ribbon or a carbon paper ribbon 6, which winds on and off spools 7 and 8 (FIG. 2), is interposed between the row of type members 4 and the paper 5.
  • a set of hammers 9, not shown in FIG. 1, is disposed in front of the paper, as shown in FIG. 2; each of said hammers when actuated by the appropriate electromagnet, will push the ink-ribbon 6 and the paper 5 against the type member in front, thereof, thereby causing the print of the desired character.
  • the actuation of the electromagnets is selectively operated under the control of a logic device.
  • the axis of the rollers 2 and 3 are slightly oblique relative to the edges of the paper.
  • the ribbon 1 is obliquely located in respect to the print line.
  • the type row 4 is arranged relative to the ribbon 1, with the same obliquity angle, in the opposed sense, so that as to the part of the ribbon which is in the immediate proximity of the paper, the row of type is substantially parallel to the print line.
  • the obliquity of the ribbon 1 has been exaggerated.
  • the ribbon moves with a constant speed represented by the vector V, which may be considered as resulting from two components, a horizontal speed V parallel to the print line, and a vertical speed V parallel to the paper feed direction.
  • each type member horizontally scans the entire print line passing in front of all print positions and accompanying the paper in its steady motion of vertical feed.
  • numeral 10 which is the leftmost type member of the row, presents itself to the first print position to the left, in the location indicated by the same letter drawn by dashed lines (shown by reference numeral 10), whereas numeral 9, which is the rightmost type member of the row, presents itself, in same first print position column, in the location indicated by the same numeral drawn by dashed lines (11).
  • the characters A and 9 printed in the first positions of two subsequent lines appear, due to the steady vertical motion of the paper, in the locations, indicated by solid lines, and are vertically separated by a space equal to the interline distance I.
  • the distance I is equal to the distance vertically separating the two type members A and 9, on the type carrying member.
  • the hammer must be in condition to operate effectively at both extreme vertical positions as shown, that is, the active surface of the printing hammer must extend approximately over the whole shaded area 12 of FIG. 3.
  • FIG. 4 represents a section of FIG. 2 along the line IV-VI, but on a different scale.
  • the paper 5 moves vertically at a constant speed.
  • FIGS. 6, 7, 8 and 9 represent the ribbon 1 straightened out showing some different possible arrangements of the type rows on the ribbon in relation to the number of the characters comprised in each set, the length of the type members rows, and the length of the print line.
  • FIG. 6 there is only one row, and between its leftmost type member 13 and its rightmost type member 14 there is an interval L wider than the print line.
  • the control device of the printing hammers does not differ from the one of the chain printers of the presently known type, as the printing of a line is initiated onlyafter terminating the printing of the preceding line as is briefly outlined hereinafter and shown in FIG. 10.
  • the interval L between the leftmost limit 15 and the rightmost limit 17 of the type row 8 is considerably smaller than the length of the print line H.
  • the arrangement shown in FIG. 8 may be used. Two rows, 19 and 22 of type members are disposed in successive position on the same ribbon. The vertical distance between the corresponding elements of two rows of type members for instance between the upper limiting line of the two rows, is equal to the space I, between printed lines, whereas the horizontal interval L is, in the preferred arrangement of FIG. 8, much smaller than the length H of the print line. If the length of every type member row is greater than the print line length H, the hammer control device in the arrangement of FIG. 8 does not differ from the one relating to the arrangement of FIG. 7.
  • the disposition indicated in FIG. 9 may be adopted.
  • three or more rows of type members are so arranged so that type pertaining to three or more consecutive print lines may be printed at the same time. correspondingly, the printing control device must be arranged in conformity to that disposition.
  • FIGS. 10 to 12 represent the storage registers for controlling the printing respectively in the event that the printing of a line is initiated only after the completing of the preceding line (FIG. 10, corresponding to the disposition of FIG. 6): or in the event that characters may be printed on a line before the end of the printing on the preceding line (FIG. 11, corresponding to the arrangements of FIGS. 7 and 8) or, finally, in the event that characters corresponding to three lines of print are typed during the same cycle (FIG. 12 corresponding to the arrangement of FIG. 9).
  • each register stores the code combination which corresponds to the character which is to be printed in correspondence of said hammer.
  • each register is indicated by R, and each register, corresponding to a single hammer, is indicated by the lower-case letters a, b, c, w, x, y, z; said lower case letter corresponds therefore to the different print positions.
  • Each register is connected to a coincidence-checking device P, which activates the actuator A, that is, in the case under consideration, the electromagnet operating the hammer when the coincidence takes place.
  • the registers R are loaded with the data related to the line n+1.
  • FIG. 11 corresponds to the arrangement of FIGS. 7 and 8. As has been explained, with this arrangement it may happen that some characters pertaining to line n+1 are printed before the printing of the nth line is terminated.
  • two sets of registers, S and R are provided.
  • the registers of the set S are loaded with the data of the line n+1 while the registers of the set R, which, at the start of the printing of the line, contained the data relating to line n, are modified in succession, substituting gradually from the left of the right, such data with data relating to line n+1.
  • a terminating command signal is associated with the leftmost end 16 (FIG. 7) of the type member set, in a manner such that, when said end has abandoned a printing position (for instance the one indicated by the index c in FIG. 11), in the corresponding register, the data relating to line it is deleted, and the data related to line +n+l is loaded therein.
  • This register is shown shaded in the FIG. 11.
  • all registers of the set R contain the data of line n+1.
  • the register set S is loaded with the data referring to line n+2 in place of the data referring to line n+1; the process is subsequently repeated in the same way.
  • register sets, S and R are provided, set S being devided in two parts, the left one of which contains the data referring to the left half of line n+1, and the right one contains the data referring to the right half of line 12.
  • two leftmost ends 24 and 26 of the type member rows may be present in the print line, two terminating command signals are associated with said ends to cause the changing of the data in the registers corresponding ot the print positions in front of which said ends have just passed. Therefore, in the register set R, there are two registers, shaded in FIG. 12, whose contents are being changed.
  • the leftmost end 24 has passed the print position corresponding to register q of FIG. 12, which is the first of the right half of the set S, the left half of the set R will contain the data referring to line n+2: and, as the leftmost end 28 has passed the last print position to the right of the line, the right half of the set R contains only the data referring to line n+1.
  • the right half of register S is loaded with the data referring to the right half of line n+2, and the left half is loaded with the data referring to the left half of line n+3.
  • a high speed printing device the combination of feeding means for moving a print medium at uniform feed velocity in a first direction, a plurality of selectively operable actuators arranged in a plurality of print positions defining a print line substantially perpendicular to the feed direction of said print medium, an endless belt type carrying member including a plurality of type members supported and obliquely disposed thereon in a straight line and having an initial type member and an end type member, said type carrying member being disposed in proximity to and in an oblique direction with respect to the print line, so that a segment of said plurality of type members facing the print medium is substantially parallel to the print line, means for moving said type carrier member along said oblique direction, the speeds of said type carrier member and of said printing medium being so related the one to the other as to move said portion of type members facing the print medium with a speed component in the direction of the feed velocity of said print medium substantially equal to said feed velocity.
  • a high speed printing device as defined in claim 2 including a plurality of storage means, one for each actuator, each of said storage means including means for receiving an electrical code combination representative of preselected type member to be printed on said printing medium in the print position defined by said actuator, and means for introducing an electrical code combination representative of a new preselected type member to each of said storage means as the end type member passes the print position defined by the actuator which said individual storage means is associated.
  • a high speed printing device the combination of feeding means for moving a print medium at a uniform feed velocity, a plurality of selectively operable actuators arranged in a plurality of print positions defining a print line substantially perpendicular to the feed direction of said print medium, an endless type carrying member including a plurality of type members supported and obliquely disposed thereon in a plurality of straight, parallel lines, each line containing the same repetitive group of type members, having an initial and an end type member, said type carrying member being disposed in proximity of and in an oblique direction with respect to the print line, so that a segment of said plurality of type members facing the print medium is substantially parallel to the print line, means for moving said type carrier member along said oblique direction, the speeds of said type carrier member and said printing medium being so related one to the other as to move said portion of type members, facing the print medium with a speed component in the direction of the feed velocity substantially equal to said feed velocity.
  • a high speed printing device as defined in claim 8 including a plurality of storage means, one for each actuator, each including means for receiving an electrical code combination representative of a preselected type member to be printed on said printing medium in the print position defined by said actuator, and means for introducing an electrical code combination representative of a new preselected type member to each individual one of said storage means as any one of the end type members passes the print position defined by the actuator to which said individual storage means is associated.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Printers Characterized By Their Purpose (AREA)
US656874A 1966-07-29 1967-07-28 High speed belt or chain printer with coordinated paper feed means Expired - Lifetime US3457855A (en)

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IT1768066 1966-07-29

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DE (1) DE1549836B2 (de)
FR (1) FR1561092A (de)
GB (1) GB1156347A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707122A (en) * 1970-07-13 1972-12-26 Peripheral Dynamics Print hammer mechanism with magnetic reinforcement to cath hammer
US3999478A (en) * 1969-09-12 1976-12-28 Iomec, Inc. Type carrier
US4444103A (en) * 1981-10-07 1984-04-24 Edward Thompson (International) Limited Belt-type printing machine

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1405722A (en) * 1919-12-05 1922-02-07 Krupp Ag Typewriter mechanism
US2770188A (en) * 1952-12-06 1956-11-13 Ibm Dick strip printer
US2776618A (en) * 1953-06-11 1957-01-08 Hughes Aircraft Co Printing cylinders for high-speed printing systems
US2811102A (en) * 1951-06-07 1957-10-29 Sperry Rand Corp Random printing means
US2831424A (en) * 1954-03-01 1958-04-22 Burroughs Corp Traveling type carriage in high speed printers
US2843243A (en) * 1955-08-09 1958-07-15 Sperry Rand Corp Printing device
US2926602A (en) * 1957-05-20 1960-03-01 Burroughs Corp Automatic printer
US2949846A (en) * 1958-03-28 1960-08-23 Burroughs Corp Printing mechanism
US3007399A (en) * 1958-06-20 1961-11-07 Oki Electric Ind Co Ltd High speed printer
US3322064A (en) * 1966-06-02 1967-05-30 Anelex Corp Print drum type matrix and sequential line printing control

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1405722A (en) * 1919-12-05 1922-02-07 Krupp Ag Typewriter mechanism
US2811102A (en) * 1951-06-07 1957-10-29 Sperry Rand Corp Random printing means
US2770188A (en) * 1952-12-06 1956-11-13 Ibm Dick strip printer
US2776618A (en) * 1953-06-11 1957-01-08 Hughes Aircraft Co Printing cylinders for high-speed printing systems
US2831424A (en) * 1954-03-01 1958-04-22 Burroughs Corp Traveling type carriage in high speed printers
US2843243A (en) * 1955-08-09 1958-07-15 Sperry Rand Corp Printing device
US2926602A (en) * 1957-05-20 1960-03-01 Burroughs Corp Automatic printer
US2949846A (en) * 1958-03-28 1960-08-23 Burroughs Corp Printing mechanism
US3007399A (en) * 1958-06-20 1961-11-07 Oki Electric Ind Co Ltd High speed printer
US3322064A (en) * 1966-06-02 1967-05-30 Anelex Corp Print drum type matrix and sequential line printing control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999478A (en) * 1969-09-12 1976-12-28 Iomec, Inc. Type carrier
US3707122A (en) * 1970-07-13 1972-12-26 Peripheral Dynamics Print hammer mechanism with magnetic reinforcement to cath hammer
US4444103A (en) * 1981-10-07 1984-04-24 Edward Thompson (International) Limited Belt-type printing machine

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DE1549836A1 (de) 1971-05-27
GB1156347A (en) 1969-06-25
FR1561092A (fr) 1969-03-28
DE1549836B2 (de) 1976-11-04

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