US3331316A - Printer having type drum with blank area and hammer on movable carriage - Google Patents

Printer having type drum with blank area and hammer on movable carriage Download PDF

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US3331316A
US3331316A US513321A US51332165A US3331316A US 3331316 A US3331316 A US 3331316A US 513321 A US513321 A US 513321A US 51332165 A US51332165 A US 51332165A US 3331316 A US3331316 A US 3331316A
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Prior art keywords
drum
hammer
printing
types
rows
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US513321A
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English (en)
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Bretti Franco
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Telecom Italia SpA
Olivetti SpA
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Olivetti SpA
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/09—Digital output to typewriters
    • 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
    • B41J1/22—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/32—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being parallel to the axis of rotation, e.g. with type on the periphery of cylindrical carriers
    • B41J1/34—Carriers rotating during impression
    • 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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/02—Hammers; Arrangements thereof
    • B41J9/04—Hammers; Arrangements thereof of single hammers, e.g. travelling along printing line
    • 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 refers to a high speed serial printing device for oilice machines and data processing equipments, comprising a continuously rotating drum provided with a plurality of parallel rows of types arranged circumferentially thereon, at least two rows of types being similar and axially distanced according to the horizontal printing spacing, and comprising a transversely movable carriage provided with a single hammer operable for engaging a selected type of said drum to effect a ilying printing thereof.
  • a printing device comprising a continuously rotating drum provided with a plurality of rows of types and with a single hammer transversely movable step by step. Due to the discontinuous movement of the hammer this device is still slow in operation, because during the hammers transverse movement no printing may be effected.
  • serial printing device which is characterized by means for continuously moving said carriage along a printing line at such a constant speed as to cover one horizontal printing spacing during one revolution of said drum, said hammer having such a transverse dimension as to fully engage any type of a predetermined row of said plurality despite of its transverse movement.
  • FIG. 1 is a partial plan view of a high speed serial printing device according to the invention.
  • FIG. 2 is a diagrammatic view of a detail of FIG. l;
  • FIG. 3 is a left hand partial sectional view taken on the line III-III of FIG. 1;
  • FIG. 4 is a left hand partial view of the device of FIG. 1;
  • FIG. 5 is a partial sectional View taken on the line V-V of FIG. l;
  • FIG. 6 is a front view of a detail of FIG. 5.
  • the printing device is embodied in an electronic calculating machine of the type described in the United States patent application Ser. No. 435,877 dated Mar. l, 1965.
  • Said calculating machine is provided with a plurality of selectable registers, and it is adapted to supply a series of signals representing the selected register, a function symbol, each order of the amount contained therein, the eventual decimal point, and the algebraic sign of said amount.
  • the printing device comprises a type drum 3 secu-red to a transverse shaft 4 continuously rotating on the machine frame in a manner known per se.
  • the drum 3 is provided with a plurality of parallel rows of types arranged circumferentially thereon and axially distanced according to the printing horizontal spacing.
  • the drum 3 is provided with twentytwo similar rows 5 of types arranged in denominational orders.
  • Each -row 5 (FIG. 2) comprises the types from the algebraic signs and The types of each row 5 are distanced or spaced circumferentially according to a given pitch, and said rows are spaced axially of said drum in accord with desired print spacing.
  • Each of said rows 5 cover substantially a 180 degrees sector or expanse on the cylindrical surface of the drum.
  • the drum 3 is provided with two rows of types 6 representing the different registers of the machine and the function symbols indicating the functions eifected by the machine.
  • the two rows 6 of types cover about ⁇ a 220 degrees sector or expanse on the cylindrical surface of the drum 3.
  • the drum surface comprises thus a portion 7 deprived or devoid of types, which in part has an expanse of degrees and in part has a lesser expanse.
  • the type-devoid sector or portion 7 provides that while it makes each passage across the printing line, the striking face of the hammer moves along the printing line a suicient distance so that the types of successive rows are adapted to be individually struck and without any part of types of adjoining rows being struck.
  • a disk 8 Secured to the left end of the shaft 4 is a disk 8 .provided with a set of ferromagnetic elements 9 each one located in correspondence with the angular position of the different types of the rows 5 and 6. Furthermore, the disk 8 is provided with a predisposing ferromagnetic element 10, preceding the element 9 of the zero types.
  • the elements 9 and 10 may be read by a magnetic head 11 for generating clock signals, in a manner known per se.
  • the printing device comprises a carriage, generically indicated by the numeral 12, comprising two flanks 13 transversely slidable along a shaft 14 (FIG. 3) secured to the machine frame, and a transverse bar 15 slidable on a shaft 16 mounted on the same machine frame.
  • Fulcrumed on a -pivot 17 secured to the anks 13 is a single hammer 18 normally urged by a spring 19 to contact a lug 21 of a bail 22 fulcrumed on a second pivot 23 secured to the same flanks 13.
  • the transverse dimension (FIG.
  • Means are provided for continuously moving the carriage 12 along a printing line, said means comprising a screw 41 rotatably mounted on the machine frame.
  • the screw -41 has a pitch twice the horizontal printing spacing and is secured to a pinion 42 (FIG. 3) intermeshing with a pinion 43 secured to the shaft 4.
  • the pinion 42 has a diameter twice the diameter of the pinion 43, whereby the screw 41 is continuously and synchronously rotated with the drum 3, at an angular speed half the speed of the drum 3.
  • the screw 41 is adapted to be engaged by a bent projection 39 of a lever 37 secured to a sleeve 38 located between the two anks 13 (FIG. 1) and rotatably and slidably mounted on the stationary shaft 14.
  • the lever 37 (FIG. 3) is provided with a shoulder 44 normally urged by a spring 46 to contact a universal bar 47 adapted to assume alternately the position shown in FIG. 3 and a position rocked clockwise.
  • the universal bar 47 is integral with two arms 48 and 49 fulcrumed on a stationary shaft 51.
  • the arm 48 is provided with a pin 52 normally urged by a spring 53 to contact a three-lobed cam 54 rotatably mounted on a stationary sleeve 55.
  • the cam 54 is provided with six holes 56, adapted to be engaged by a pin 57 of a lever 58 rotatably mounted on a rod 59 and normally urged by a spring 61 to contact a stationary pin 62.
  • the rod 59 is 'slidably mounted within the sleeve 55 (FIG. 1) and is secured to an armature 63 of a second electromagnet 64.
  • the lever 58 is provided with a second pin 65 adapted to be brought into the path of a projection 66 (FIG. 3) of a slide 67 having a projection 68 slidable into a notch of the machine frame and having a slot 69 slidable on a cylindrical portion of the screw 41.
  • the slide 67 is provided with a pair of lugs 71 cooperating with a main cam formed of a circular eccentric 72 secured to the same screw 41.
  • a compression spring 74 located on the rod 59 between the lever 58 and the sleeve 55 normally urges the lever 58 and the rod 59 rightwards, whereby the pin 57 is disengaged from the cam 54, While the pin 65 is disengaged from the projection 66 (FIG. 3).
  • a second compression spring 76 (FIG. 1) is located between a flange 73 secured to the rod 59 and a slide 77. This latter is axially slidable on the rod 59 and on the shaft 16 and is provided with a lug 78 normally urged by the spring 76 to contact a crank lever 79 secured to the shaft 16.
  • the crank lever 79 is provided with a bent lug 81 having a tapered edge adapted to be engaged by a lug 82 (FIG. 5) of the bracket 35 when the carriage 12 is at rest in the position shown in FIG. 1.
  • crank lever 83 Secured to the left end of the shaft 16 is another crank lever 83 provided with a pin 84 adapted to be engaged by the left hand flank 13 of the carriage 12. Furthermore, the crank lever 83 is provided with a lug 86 (FIG. 4) adapted to cooperate with an end 87 of a lever 88 fulcrumed on the shaft 51.
  • a spring 89 is tensioned between the crank lever 83 and the lever 88 and on one hand normally urges the shaft 16 counterclockwise and the lug 81 (FIG. 5) of the crank lever 79 to contact the lug 82 of the bracket 35. On the other hand the spring 89 urges the lever 88 (FIG. 4) to contact a lug 91 of the arm 49 of the universal bar 47.
  • the arm 49 is provided with a lug 92 operating a first signal generator adapted to be set from a rst condition to a second condition and formed of an electrical switch 93 (FIG. 1), which at rest is adapted to render ineffective the signals generated by the head 11 in a known manner.
  • the lever 88 is provided with a lug 94 adapted to operate a second signal generator or electrical switch 96, which when operated prevents in a known manner the machine from sending a printing starting signal.
  • the high speed serial printing device operates as follows.
  • an electric printing starting signal is produced and causes the electromagnet 64 (FIG. l) to be energized at an instant irrespective from the angular position of the drum 3. Then the electromagnet 64 displaces the rod 59 leftwards bodily with the slide77. If the projection 66 of the slide 67 for the time being lies in front of the pin 65 of the lever 58, as shown in FIG. 3, the lever 58 is temporarily prevented from following the rod 59.
  • the eccentric 72 displaces the slide 67 forwards (rightwards in FIG. 3)
  • its projection 66 disengages the pin 65 of the lever 58
  • the electromagnet 64 (FIG. 1) displaces now the rod 59 and the lever 58 leftwards.
  • the pin 57 enters a hole 56 (FIG. 3) of the cam 54 and brings the pin 65 into the path of the projection 66 of the slide 67.
  • the universal bar 47 when rocked counterclockwise causes the spring 46 to rock the lever 37 clockwise, thus engaging the projection 39 with the screw 41.
  • the engagement of the projection 39 with the screw 41 becomes effective when the screw shows a notch to the projection 39, whereby the carriage 12 is connected to the screw 41 when the drum 3 is in a predetermined angular position presenting to the hammer 18 the portion 7 deprived of types, as indicated in FIG. 2.
  • the screw 41 (FIG. l) through the lever 37 continuously moves the carriage 12 leftwards at such constant or given speed and so synchronized with the rotative speed of the drum, that during successive turns of said drum the types of different rows come successively into character printing range of the striking face ⁇ of the hammer at the printing line.
  • the striking face of the hammer describes with reference to the rotating drum 3 a helicoidal bandpath shown by dot-and-dash lines in the FIG. 2. From FIG. 2 it appears also clear that the individual type rows 5, 6 are completely situated within partial turns of said heliocoidal band-path by reason of the travel of the hammer which occurs while the type-devoid drum sector is moved along the printing line.
  • the striking face of the hammer is of a width to engage the individual types in any row 5 or 6 without engaging at the same time any of the types in adjacent type rows.
  • the calculating machine sends a signal representing the algebraic sign of the amount, which is thus printed at the left of the amount. Furthermore, this signal causes the electromagnet 64 (FIG. 1) to be energized in a known manner, whereby the armature 63 displaces the rod 59 leftwards as in the case of the starting of printing a line. Now the slide 67 (FIG. 3) through the lever 58 rocks against the cam 54 counterclockwise, thus restoring clockwise the arm 48 together with the universal bar 47 and the arm 49. The universal bar 47 ⁇ disengages the lever 37 from the screw 41, whereby the carriage 12 (FIG. 1) may be restored rightwards by the spring 34. The return stroke of the carriage is controlled by the centrifugal brake 31 (FIG. 3).
  • the arm 49 (FIG. 4) through its lug 92 resets the switch 93, and signals to the machine that the carriage 12 has been disengaged from the screw 41.
  • the switch 93 unlocks now some functions of the machine locked during the printing.
  • the lever -88 is released by the lug 91 of the arm 49, but it cannot immediately follow the arm 49 because it is locked by the lug 86 of the crank lever 83, whereby the switch 96 still prevents the machine from sending a printing starting signal until the carriage 12 is out of its transverse rest position.
  • the lug 82 (FIG.
  • bracket 35 engages the tapered edge of the lug 81 of the crank lever 79, which is rocked clockwise together with the shaft 16 and the crank lever 83 (FIG. 4). Then the lug 86 of the crank lever 83 disengages the lever 88, which may finally reset the switch 96 and signals to the machine that the carriage 12 has been restored.
  • the return of the carriage 12 to the right may be caused mechanically when the carriage 12 reaches the left end of its stroke.
  • the left hand flank 13 (FIG. l) of the carriage 12 engages the pin 84 of the crank lever 83, the shaft 16 is displaced leftwards together with the crank lever 79 and the slide 77.
  • This latter compresses now the spring 76 which overcomes the spring 74 and may displace the rod 59 leftwards together with the lever 58 at the instant wherein the projection 66 (FIG. 3) of the slide 67 releases the pin 65.
  • the cam 54 is thus rotated 60 degrees counterclockwise and through the universal bar 47 and the lever 37 causes the carriage 12 to be returned to right in the manner above described.
  • the printing is effected on a conventional paper web 97, which is fed from a tally roll 98 and is .guided around the drum 3 by a guide plate 99.
  • a conventional ink ribbon 100 Inserted between the paper 97 and the hammer 18 is a conventional ink ribbon 100, which is fed in a known manner from one to another of a pair of ribbon spools 101 (FIG. 1) located behind the drum 3.
  • the paper web 97 has such a width as to cover the drum 3, as well as a pair of knurled wheels 102 located at the two ends of the drum and rotatably mounted on the shaft 4.
  • the paper 97 is pressed against each wheel 102 by a corresponding paper pressing 'roller 103 (FIGS. 4 and 5) fulcrumed on a pin 104 of a lever 106.
  • These levers are fulcrumed on a shaft 107 rotatably mounted on the machine frame and are urged clockwise each one by a spring 108.
  • the two wheels 102 Secured to the two wheels 102 are two hubs 109 integral with a pair of pinions intermeshing with a corresponding pair of pinions 111 secured to the shaft 107, whereby the two wheels 102 are always bodily rotated.
  • the right hand pinion 111 (FIG. 5) cooperates with a locking lever 112 fulcrumed on a shaft 114 rotatably mounted on the machine frame.
  • the left hand pinion 111 (FIG. 4) meshes with a pinion 113 secured to the shaft 114 in turn secured to a set of rubber rollers 115 (FIGS. 1 and 3) for advancing the paper web 97.
  • a knob 116 (FIG. 5) adapted to be manually operated to advance the paper by hand.
  • the right hand pinion 110 may cooperate with a lug 117 (FIG. 5) of a pawl 118 operable for line spacing the paper web 97.
  • the pawl 118 is normally urged by a spring 119 to contact both the hub 109 and an edge 121 (FIG. 6) of a first transverse lever 122 fulcrumed on a stationary pivot 123.
  • the lever 122 is provided with a bent l-ug 124 normally urged by a spring 126 to contact a second transverse lever 127 fulcrumed onthe pivot 123 as well.
  • the lever 127 is urged clockwise by a spring 128 and contacts a tapered edge of a lug 129 bent yfrom the arm 48. Furthermore, the lever 127 is provided with an edge 131 normally out of the vertical path of the pawl 118, the edge 131 being lower than the edge 121 of the lever 122.
  • the pawl 118 is also provided with a recess 132 (FIG. 5) normally located behind the levers 122 and 127 and with a recess 133 adapted to engage a lug 134 of the slide 67.
  • the lever 122 is provided with a lug 136 adapted to cooperate with a projection 1137 of a stem 138- slidable on the pivot 123 and on a stationary pin 141.
  • the stem 138 carries a key 139 for manually operating the line spacing, and is nonmally urged upwards by a spring 142.
  • the key 139 is to be depressed. Then the projection 137 (FIG. 6) of the stem 138 engages the lug 136 of the lever 122 which is rocked counterclockwise independently from the lever 127. Now the pawl 118 may engage directly its recess 133 with the lug 134 (FIG. 5) of the slide 67, whereby a line spacing is effected at each revolution of the eccentric 72 as long las the key 139 is held depressed.
  • the device may be embodied in a typewriter, a teleprinter or an accounting machine, wherein the printing is effected from the left to the right.
  • each type row of the drum 3 comprises a set of alphanumeric types, whereas the signals corresponding to the types to be printed in each line are previously stored in a suitable memory.
  • the stem 138 (FIG. 5) -may be automatically operated in order to obtain a vertical tabulation of the paper web 97.
  • the reciprocatory movement of the universal bar 47 may be effected directly by the slide 67 upon a predisposing transverse movement of the bar 47 effected by the magnet 64 (FIG. l).
  • the magnet 64 may be held energized during the printing of the entire line in a manner known per se.
  • a high speed serial printing device for office machines and data processing equipments having a type drum, means for rotatably supporting said drum in an yaxially xed position, a plurality of parallel rows of types, each one of said rows being arranged circumferentially on said drum, at least two rows of types being similar and axially distanced according to the horizontal printing spacing, and comprising in combination:
  • said hammer having a transverse dimension equal to said horizontal spacing, whereby any type of a predetermined row of said plurality may be fully engaged by said hammer despite its transverse movement,
  • a high speed serial printing device for office machine and data processing equipments having a type drum, means for rotatably supporting said drum in an axially fixed position, a plurality of parallel rows of types, each one of said rows being arranged circumferentially on said drum, at least two rows of types Ibeing similar and axially distanced according to the horizontal printing spacing, and comprising in combination:
  • said hammer having such a transverse dimension as to fully engage any type of a predetermined row of said plurality despite its transverse movement.
  • a high speed serial printing device for office machines and data processing equipments having a type drum, means for rotatably supporting said drum in an axially xed position, a plurality of parallel rows of types, each one of said rows being arranged circumferentially on said drum, at least two rows of types being similar and axially distanced according to the horizontal printing spacing, and comprising in combination:
  • a high speed serial printing device for office machine and data processing equipments having a type drum, means for rotatably supporting said drum in an axially fixed position, a plurality of parallel rows of types, each one of said rows being arranged circumferentially on said drum, at least two rows of types being similar and axially distanced according to the horizontal printing spacing, and comprising in combination:
  • (k) a first signal generator adapted to be set -by said universal bar to a pair of conditions associated with said pair of positions.
  • a device according to claim S comprising:
  • a high speed serial printing device for oflice machines and data processing equipments, having a type drum, means for rotatably supporting said drum in an axially xed position, a plurality of parallel rows of types, each one of said rows Ibeing arranged circumferentially on said drum, at least two rows lof types being similar and axially distanced according to the horizontal printing spacing, and comprising in combination:
  • (l) a pair of elements normally locking said pawl means to prevent same from being operated, one of said elements being disabled upon starting the printing of each line, the other element being disabled upon terminating the printing of said line.
  • a high speed serial printing device of a kind used in oi-ce and data processing equipment having a type drum, means rotatably supporting said drum in an axially xed position, said drum having a plurality of at least two parallel rows of types circumferentially provided thereon, the types of said rows being spaced circumferentially according to a given pitch and said rows being spaced axially of said drum in accord with desired print spacing, said device distinguished by embodying in cornbination,
  • said hammer having a striking face of a width so that while it is moved along said printing line, it will describe a helicoidal band-path in reference t-o the rotating drum, in which band-path, within partial turns thereof, the individual type rows are completely situated by reason of the travel of the hammer which occurs while the type-devoid drum sector rotates across the printing line.
  • a high speed serial printing device of a kind used in office and data processing equipment having a type drum, means rotatably supporting said drum in an axially fixed position, said drum having a plurality of at least two parallel rows of types circumferentially provided thereon, the types of said rows being spaced circumferentially according .to a given pitch and said rows being 'spaced axially of said drum in accord with desired print spacing, bination,
  • (g) means to move said carriage at a given speed along said printing line and so synchronized with the rotative speed of said drum that during successive turns of said drum the types of different rows come successively at the printing line into character printing range of the striking face on said hammer,
  • said hammer having a striking face of a width so that while it is moved along said printing line, it will describe a helicoidal band-path in reference to the rotating drum, in which band-path, within partial turns thereof the individual type rows are completely situated by reason of the travel of the hammer which occurs while the type-devoid drum sector rotates across the printing line.
  • a high speed serial printing device of a kind used in oce and data processing equipment having a type drum, means supporting said drum in an axially fixed position,
  • said device distinguished by embodying in comsaid drum having a plurality of .at least two parallel rows of types circumferentially provided thereon, the types of Said rows being spaced circumferentially according to a given pitch and said rows being spaced axially of said drum in accord with desired print spacing, said device distinguished by embodying in combination,
  • (e) means -to move said hammer at a given speed along said printing line and so synchronized with the rotative speed of said drum that during successive turns of said drum the types of different rows come successively at the printing line into character printing range of the striking face on said hammer, comprislng,
  • said hammer having a striking face of a width so that when it is moved along said printing line, it will describe a helicoidal band-path in reference to the rotating drum, in which band-path, within partial turns thereof, the individual type rows are cornpletely situated by reason of the travel of the hammer which occurs while the type-devoid sector rotates across the printing line.
  • a high speed serial printing device of a kind used in oflice and data processing equipment having a type drum, means supporting said drum in an axially fixed position, said drum having a plurality of denominational order rows of types provided thereon in adjacent circumferential rows and each row comprising all the figures of an order, the types of said rows being spaced circumferentially according to a given pitch and said rows being spaced axially of said drum in accord with desired print spacing, said device distinguished by embodying in combination,
  • said hammer having a striking face of a width so that while it is moved along said printing line, it will describe a helicoidal band-path in reference to the rotating drum, in which band-path, within partial turns thereof, the individual type rows are completely situated by reason of the travel ofthe hammer which occurs while the type-devoid drum sector rotates across the printing line.
  • a high speed serial printing device of a kind used in oflice and data processing equipment having a type drum, means supporting said drum in an axially fixed position, said drum having a plurality of adjacent parallel rows of ltypes provided circumferentially thereon, at least one of said rows comprising a series of register identifying types, the other rows compising each a set of digit types, a decimal-point type and two algebraic sign-types, the types of said rows being spaced circumferentially according to a given pitch and said rows being spaced axially of said drum in accor-d with desired print spacing, said device distinguished by embodying in combination,
  • (f) means to operate said hammer when a selected type of any of said rows comes into printing range of said hammer
  • said hammer having a striking face of a width so that while it is moved along said printing line, it will describe a helicoidal band-path in .reference to the rotating drum, in which barid-path, within partial turns thereof, the individual type rows are completely situated by reason of the travel of the hammer which occurs while the type-devoid drum sector rotates across the printing line,
  • a high speed serial printing device of a kind used 1n oice and data processing equipment having a type drum, means supporting said drum in an axially fixed position, said drum having a plurality of at least two parallel rows of types circumferentially provided thereon, the types of said rows being spaced circumferentially according to a given pitch and said rows being spaced axially of said drum in accord with desired print spacing, said device distinguished by embodying in combination,
  • (e) means to move said hammer at a given speed along said printing line and so synchronized with the rotative speed of said drum that during successive turns of said drum the -types of different rows come successively at the printing line into character printing .range of the striking face on said hammer,
  • (f) means to operate said hammer when a selected type of any of said rows comes into printing range of said hammer
  • said hammer having a striking face of a width so that While it is moved along said printing line, it will describe a helicoidal band-path in reference to the rotating drum, in which band-path, within partial turns thereof, the individual type rows are completely situated by reason of the travel of the hammer which occurs while the type-devoid drum sector rotates across the printing line,

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
US513321A 1965-01-02 1965-12-13 Printer having type drum with blank area and hammer on movable carriage Expired - Lifetime US3331316A (en)

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US (1) US3331316A (ko)
BE (1) BE674454A (ko)
CH (1) CH435820A (ko)
DE (2) DE1288344C2 (ko)
FR (1) FR1462107A (ko)
GB (1) GB1112670A (ko)
SE (1) SE351309B (ko)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415184A (en) * 1966-04-12 1968-12-10 Olivetti & Co Spa High speed serial printing device for teleprinters, accounting machines and data processing equipments
US3420166A (en) * 1966-07-30 1969-01-07 Int Computers & Tabulators Ltd Paper carriage shifting means in high speed line printers
US3472352A (en) * 1967-06-28 1969-10-14 Burroughs Corp High speed serial printer
US3593833A (en) * 1967-04-03 1971-07-20 Olivetti & Co Spa Device for supporting and guiding a roll of paper in a calculating, accounting or like machine
US3596594A (en) * 1968-04-22 1971-08-03 Nippon Telegraph & Telephone High-speed printer employing plural print heads and paper feed expedients
US3613574A (en) * 1969-02-10 1971-10-19 Sperry Rand Corp Selective printing means including a rotatable drum having interspersed complementary character sets thereon
US3630335A (en) * 1970-07-22 1971-12-28 Singer Co Printing means with plural helical sets of type
US3704666A (en) * 1971-05-03 1972-12-05 Burroughs Corp High speed multiple tape serial printing mechanism
US3706367A (en) * 1969-06-03 1972-12-19 Olivetti & Co Spa High speed serial printing device for typewriters, teleprinters, calculating machines, accounting machines and the like
US3710912A (en) * 1969-04-16 1973-01-16 Olivetti & Co Spa High speed serial printing device for typewriters, teleprinters, calculating machines, accounting machines and the like
US3719139A (en) * 1970-07-14 1973-03-06 Honeywell Inf Systems Italia High-speed printer with selectively operable print hammer
US3724631A (en) * 1971-01-15 1973-04-03 Printer Technology Inc Printer with helically arranged type divided into axially offset group
US3750794A (en) * 1970-12-01 1973-08-07 Burroughs Corp High speed print drum with traveling print hammer
US3929215A (en) * 1973-10-12 1975-12-30 Matsushita Electric Ind Co Ltd Printing mechanism
US3972280A (en) * 1974-12-09 1976-08-03 Computer Peripherals, Inc. Apparatus for time sharing of horizontal and vertical advance
USRE29832E (en) * 1973-10-12 1978-11-14 Matsushita Electric Industrial Co., Ltd. Printing mechanism

Citations (4)

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US2656240A (en) * 1948-12-20 1953-10-20 Siemens Ag Recording apparatus for the reception of message characters
US3135195A (en) * 1961-06-22 1964-06-02 Potter Instrument Co Inc High speed printer with moving characters and single hammer
US3188947A (en) * 1963-01-11 1965-06-15 Burroughs Corp Platen actuating means in high speed belt printer
US3220343A (en) * 1960-11-25 1965-11-30 Potter Instrument Co Inc High speed printers with column spanning hammers

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US2254299A (en) * 1938-03-01 1941-09-02 Firm Cie Parisienne De Distrib Tabulating machine or the like
DE838322C (de) * 1949-07-01 1952-05-23 Siemens Ag Verfahren zur UEbertragung von Schriftzeichen

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US2656240A (en) * 1948-12-20 1953-10-20 Siemens Ag Recording apparatus for the reception of message characters
US3220343A (en) * 1960-11-25 1965-11-30 Potter Instrument Co Inc High speed printers with column spanning hammers
US3135195A (en) * 1961-06-22 1964-06-02 Potter Instrument Co Inc High speed printer with moving characters and single hammer
US3188947A (en) * 1963-01-11 1965-06-15 Burroughs Corp Platen actuating means in high speed belt printer

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415184A (en) * 1966-04-12 1968-12-10 Olivetti & Co Spa High speed serial printing device for teleprinters, accounting machines and data processing equipments
US3420166A (en) * 1966-07-30 1969-01-07 Int Computers & Tabulators Ltd Paper carriage shifting means in high speed line printers
US3593833A (en) * 1967-04-03 1971-07-20 Olivetti & Co Spa Device for supporting and guiding a roll of paper in a calculating, accounting or like machine
US3472352A (en) * 1967-06-28 1969-10-14 Burroughs Corp High speed serial printer
US3596594A (en) * 1968-04-22 1971-08-03 Nippon Telegraph & Telephone High-speed printer employing plural print heads and paper feed expedients
US3613574A (en) * 1969-02-10 1971-10-19 Sperry Rand Corp Selective printing means including a rotatable drum having interspersed complementary character sets thereon
US3710912A (en) * 1969-04-16 1973-01-16 Olivetti & Co Spa High speed serial printing device for typewriters, teleprinters, calculating machines, accounting machines and the like
US3706367A (en) * 1969-06-03 1972-12-19 Olivetti & Co Spa High speed serial printing device for typewriters, teleprinters, calculating machines, accounting machines and the like
US3719139A (en) * 1970-07-14 1973-03-06 Honeywell Inf Systems Italia High-speed printer with selectively operable print hammer
US3630335A (en) * 1970-07-22 1971-12-28 Singer Co Printing means with plural helical sets of type
US3750794A (en) * 1970-12-01 1973-08-07 Burroughs Corp High speed print drum with traveling print hammer
US3724631A (en) * 1971-01-15 1973-04-03 Printer Technology Inc Printer with helically arranged type divided into axially offset group
US3704666A (en) * 1971-05-03 1972-12-05 Burroughs Corp High speed multiple tape serial printing mechanism
US3929215A (en) * 1973-10-12 1975-12-30 Matsushita Electric Ind Co Ltd Printing mechanism
USRE29832E (en) * 1973-10-12 1978-11-14 Matsushita Electric Industrial Co., Ltd. Printing mechanism
US3972280A (en) * 1974-12-09 1976-08-03 Computer Peripherals, Inc. Apparatus for time sharing of horizontal and vertical advance

Also Published As

Publication number Publication date
CH435820A (it) 1967-05-15
DE1288344C2 (de) 1975-11-20
BE674454A (ko) 1966-04-15
SE351309B (ko) 1972-11-20
FR1462107A (fr) 1966-12-09
DE1288344B (de) 1969-01-30
GB1112670A (en) 1968-05-08
DE1611472A1 (de) 1971-01-14

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