US3461796A - High-speed printer with shared control circuit - Google Patents

High-speed printer with shared control circuit Download PDF

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US3461796A
US3461796A US684571A US3461796DA US3461796A US 3461796 A US3461796 A US 3461796A US 684571 A US684571 A US 684571A US 3461796D A US3461796D A US 3461796DA US 3461796 A US3461796 A US 3461796A
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print
font
driver
hammer
roll
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Ross A Belson
John F Zettler
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Honeywell Inc
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Honeywell Inc
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06K15/06—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by type-wheel printers

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  • the time-sharing of driver electronics is particularly advantageous when the type-font is offset-in-groups so that during any line-scan-time (time interval during which two successive lines of font register at a particular col- 3,461,796 Patented Aug. 19, 1969 ice umn), different sub-sets of font are staggeringly registered at the printing line.
  • a particular driver unit may be enabled (for each character-roW)-first for an initial column (in its associated set), then, slightly thereafter, for a second column; next for a third column, and so forth.
  • a particular example of such a time-sharing font arrangement is indicated for type-roll PR in FIG- URE 1 where the font is offset into two zones (i.e.
  • lt is thus a primary object of the present invention to provide improved printing apparatus exhibiting the aforedescribed and related features and advantages and alleviating the aforedescribed shortcomings. Another object is to provide an improved high-speed printer employing shared driver electronics for sets of print-hammers.
  • a further object is to provide such a printer wherein the type-roll includes a shared font arrangement having different offset groups of font corresponding to the sharing hammer positions.
  • FIGURE l a schematic, fragmentary exemplary representation of one embodiment including a type-roll with a halved type shared-font arrangement, also indicating in schematic fashion a few exemplary hammers and associated electronic driver units coupled thereto in sharinghammer fashion;
  • FIGURE 2A is a modification of the showing in FIG- URE 1 indicating an alternate font arrangement and associated hammer-sharing arrangement, FIGURES 2B and 2C indicating, schematically driver control electronics associated with this arrangement; while FIGURE 2D indicates a representative timing diagram for this electronics; and
  • FIGURES 3A, 3B represent more detailed showing of driver control logic and electronics of the type indicated in FIGURES 2A, 2B while FIGURE 3C represents a timing chart illustrating typical operations of elements in FIGURES 3A and 3B.
  • FIGURE l shows a novel half-twisted type roll PR' adapted to optimize such sharing according to a particular related offset font arrangement.
  • Type roll PR comprises a conventional type roll (used commonly in high speed line printers); modified somewhat to so arrange this offset font to correspond to the shareddriver circuit arrangement by a half-twisting of roll PR (see below).
  • the printing solenoid array S1 through S132 comprises a set of 132 conventional solenoid-hammer-slug units (eg. as described in U.S.
  • Patent 3,285,165 to Richter is divided into two groups: namely, a first solenoid group S-1 through S'-66, corresponding to print hammers H1 through H66 (dening print positions 1 through 66, along columns C1 through C-66 corresponding to a first font set on PR', as indicated on the first half-roll PR'-1); and a second solenoid group, SL67 through S-132, co1'- responding to hammers H-67 -H-132 (and defining at print positions 67 through 132, along columns C-67 through C-l32; these corresponding to a second font set on a second half roll PR-2 offset or type roll, halftwisted, with respect to the font-rows on PR-1 according to the invention).
  • a first solenoid group S-1 through S'-66 corresponding to print hammers H1 through H66 (dening print positions 1 through 66, along columns C1 through C-66 corresponding to a first font set on PR', as indicated on the first half-roll PR'-1
  • driver circuits HD are arranged to energize a respective pair of sharing solenoids (such as S-1 and S-6'T connected to time-share driver HD-1, doing so at alternate halves of each characterscan period).
  • a common power supply PS is arranged so as to alternately energize, first one solenoid group and then the other, i.e.
  • SL67 through S-132 alternating (switching via silicon controlled rectifiers SCR-1, SCR-2) in synchronism with the registration (along print-line P-P) of alternate, offset character-row halves (PR1, PR-2) with each solenoid group, successively.
  • power would first be applied along a first power buss B-1 in synchronism with the registration of a first half-row of font (e.g. font row D D on the second half-roll PR-2, associated with hammers H-67-H-132).
  • buss B-2 will come on and B-1 go off during a succeeding halfcycle of (of power-application) in synchronism with the registering of the next half-row (eg.
  • type font may be otherwise sharinglyarranged to be swept past the print line in (two) successive, offset waves (staggered half-rows at different times during passage of a single character-row or scan); in this case, type roll PR will be understood as comprising a pair of half-twisted sharing portions, PR-1 and PR2, with the font rows in PR-1 effectively twisted about 1/2 a character height (SP-1) so that, for each character-row, one half-row follows the other in sweeping past PP (for eX- ample, sector SP-1 will register at P-P just after its counterpart, SP-1').
  • the twist-spacing that effects this may be set according to the prescribed type roll speed.
  • font-heights SP4, SP-1 would each be about 100 mils, while the inter-row gaps SP-Z, SP2 (on each half-roll) are about 50 mils.
  • elements eg. type-roll size, hammer units
  • drum speed 300 r.p.m.
  • staggered type-font arrangements are not new, broadly speaking; for instance, being taught in U.S. 2,111,121 to Mills (e.g. FIGURE and associated description).
  • these old arrangements are typically required to be staggered between rows (i.e. checkerboard array of font rows for antighosting purposes or to accommodate various mechanical hammer sharing arrangements such as multi-column spanning hammers such checker-board font requiring an undesirable oversized print roll; e.g. see U.S. #Re 26,240' to Wasserman).
  • the non-mechanical, electronic sharing of the in- Cil vention accommodates a more compact staggered font array, offset within a row (height) and requiring neither an oversized print roll, nor mechanical changes such as alteration in the usual (full) hammer slug array, multislug actuator means, etc.
  • row E E of PR-1) next becomes print-registered (for hammers H1 through H-66-during approximately the time for the surface of PR to be swept through the offset distance SP-2), power supply P being controlled in synchronism with the rotation of PR' then disables buss B-Z and enables buss Bwl (ON) so that then any selected ones of solenoids S-1 through S-66 may be fired by associated shared drivers HD-1 through HD-66 (to likewise print an E).
  • driver HD-l ⁇ would first be activated during the time the power buss B-l went high so as to fire hammer H-1 and, shortly thereafter, would again be activated during the time B-1 goes high so as to fire hammer H-67.
  • the synchronization of busses B-2, B-2 with PR motion ' may be effected conventionally (cf. control lines PR-P). (Note that in some cases switching the buss may effect firing, rather than firing afterward, as here.)
  • an array of type font may be otherwise arranged to be swept past the printlocus.
  • P-P in successive half-waves (each font-row passing at two successive font-times, rather than simultaneously--or even three or more waves).
  • a conventional roll not half-twisted as PR
  • fire the first group of solenoids S-1 through S-66
  • S67 through S-132 S67 through S-132
  • each driver circuit HD may be connected in common with four (rather than two) solenoids; each of the four solenoid groups being enabled by a respective power buss and at a respective font sub-cycle time (e.g. being activated during one of four successive type roll revolutions if the resultant slow-down of print-speed can be tolerated).
  • each solenoid and, conventionally, an associated actuator, adapted to strike an independently mounted print-slug to effect printing
  • a single respective hammer unit print-column
  • such may be adapted to so operate a number of hammer units (e.g. as taught in co-pending application S.N. 695,186, to R. Belson and C. Bickoff, filed Jan. 2, 1968).
  • Such a mechanical sharing of actuators by hammer units will be understood as slowing maximum printing speed somewhat.
  • a common power source 4 ⁇ -IVS is schematically indicated as applied at an input terminal and may comprise a lll-volt, 10 amp. source having a rating of about 400 ⁇ watts and sufficient capacitive storage (e.g. large bank of condensers) to provide the brief, high-current pulses required.
  • Power is selectively applied to one of buss lines B-I, B-2 (alternatively, in synchronism with type roll rotation) via associated solid state switch means, namely SCR-1, SCR-2 respectively.
  • Each switch (a silicon controlled rectifier or the like) is energized ⁇ from an associated transformer (T-1, T-Z respectively) which is conventionally activated, in turn, by an associated switching pulse (source not shown) P-l, P-Z, understood as being applied (along PR-P) from a source synchronous with the rotation of PR'.
  • P-l switching pulse
  • P-Z switching pulse
  • pulse P-ll will enable SCR-1 to apply power (-i-VS) along buss B-1 when its associated half-rows of font (on associated half-roll PR-1) is print-registere
  • pulse P-2 will control SCR-2 to apply power along buss B2 when its associated half-rows (on half-roll PR-2) are print-registered.
  • SCR-1 and SCR-2 are effected conventionally and that they may likewise be switched-off conventionally (preferably, driver circuits HD interrupt the current flow and, shortly thereafter, an auxiliary hold-current circuit is de-energized to reduce bus current exactly to zero).
  • FIGURE 2A shows an alternate embodiment for sharing hammer driver electronics (coupling solenoids and drivers) in a similar manner though somewhat modified; while FIGURE 2B representationally indicates hammerselect/driving logic associated with this embodiment.
  • this embodiment is shown very schematically and will be understood as the same in construction and operation except as below mentioned. It will be understood that, here, an array of hammer-energizing solenoids S1 through S-132 (only a representative few shown one for each of 132 print-columns C-l to C132) are provided together with associated hammer driver circuits (HD-1, HD-Z etc.
  • circuits HD being each adapted to energize a respective pair of solenoids at alternate times, each from one of two respective buss lines B-1, B-Z (in the manner aforedescribed with respect to FIGURE l).
  • a logical print-command tcp at a given print position is combined with a corresponding print-timing pulse pip at a respective gate portion of the driver (e.g.
  • driver circuits may be understood as represented by HD-l which is indicated in FIGURE 2C as having a two-legged gate G1, adapted to enable a following power ampliiication stage A1, for providing a properly-timed, amplified fire pulse fp-1.
  • Such a driver would typically generate an output fp-1 of about 4 amps in response to a logical command pulse tcp-1 of about l ma.
  • buss lines B-1, B-Z are understood to be alternately energized with associated driving pulses B1, B2.
  • Drivers HD will be understood as being each coupled to apply such output pulses fp in parallel to a pair of associated solenoid coils S' (coils S', through S132 understood as respectively part of hammer solenoid assemblies S-l through S-132 of FIGURE 2A).
  • driver HD-l applies such fire-pulses fp to associated coils S1, S3 (these being alternately enabled via busses B1, B2 for pulses frz-1, fp-3, respectively); while HD-Z similarly controls coils S'2, S3, etc.
  • such shared driver arrangements may be controlled from a pair of hit storage means, each coupled to half of the drivers from respective cell locations thereof and being adapted to apply a plurality of different sharemode-synchronized hit signals to each respective driver at different times, corresponding to the aforementioned font-waves. That is, as represented in the embodiment of FIGURE 2B a pair of (odd, even) storage registers, OBR, EBR are provided, each having a number of (bit-position) storage cell-sets, one set for each respective (odd, even printing hammer) driver HD, the total number of cells corresponding to the number of printsolenoids, the cell-sets being organized to reflect the aforedescribed driver-sharing arrangement.
  • odd register OBR has 66 cell locations (for hit signals corresponding to columns C-1, C-S C-131) paired so that cells #1 and #3 may control driver HD-l, cells #5 and #7 control HD-S, and so on, as particularized below.
  • each register will be understood as accepting a train of 66 hit-bits tcp in order successively and as conventionally controlled to then step these bits to respective cell-locations (eg. hit signal tcp-1 for Sl in cell #1) prior to initiating printing of a given print-line.
  • each such hit-bit tcp for a respective print (solenoid) position will be understood as adapted to enable that associated driver (eg. HD-1) as aforementioned.
  • odd register OBR is intended to be filled by an appropriate (conventional) distributor stage IS with odd hit-signals (tcp-1, tcp 3 etc. through tcp-131) corresponding to (print, no-print commands--e.g binary ones or zeros) for successive odd print positions (corresponding to solenoids Sl, S'3 etc. through Slal).
  • distributor IS is arranged to fill even register EBR with the even hit signals (e.g.
  • HD-l for instance, first operate (print or notprint in first sub-cycle time-when B1 high) responsive to the hit bit contents of register cell #1; and then slightly later operate responsive to the contents of cell #3 (in synchronism with B2 at the second sub-cycle time).
  • solenoids e.g. S', and S3
  • B-l, B-Z power buss
  • a step pulse sb will be applied to each register to shift the contents (left) by one cell position, a function which is conventional in the art and readily attained (for instance, -by applying pulse sb to be applied with B2 when B-2 goes on).
  • Print roll PR in FIGURE 2A will be understood as having a shared arrangement of font (in the manner of PR', but modied) and generally adapted to sweep sub-rows of font past the print-line in staggered waves, although other arrangements may be substituted.
  • the operation of this arrangement may be better understood by consideration of the indicated oiTset-by-two font arrangement in conjunction with the exemplary operations described for the associated timing chart in FIGURE 2D, below.
  • this offset-by-twos font arrange ment shown fragmentarily
  • each particular (row of) font is print-registered in pairs of columns, i.e. in a skipping-by-twos mode.
  • a first row a'-a' on PR will print-register font (at plane P-P) for columns C-S, C-4, C-7, IC--8 etc. (and associated solenoids S-3, S-4, S-7, S-8 etc.), this time corresponding to print-A time (sub-cycle) for these columns.
  • PR has rotated sufficient to print-register the second related offset row a-a
  • print- A time for the other columns C-1, C-Z etc.
  • two offset print-times (print-B, etc.) will 7 occur and (registers OBR, EBR -being refilled foreach such print-time) alternate columns likewise successively enabled for printing.
  • axis TR is intended to represent the passage (with time understood along abscissa) of successive normal and offset character font rows as indicated by normal character A (registered along a-a) and offset character A (indicated as A' registering along offset font row aa); plus normal character B (row b-b), etc.
  • Axis LR is intended to represent the loading function whereby distributor IS (FIGURE 2B), upon the approach of a particular font row, such as (a-a) accesses a single-character Buffer Memory m which has (previously, as known in the art) stored a serial array of hit bits (B) corresponding to the up-coming character, to be supplied in order as aforeindicated alternately to registers OBR, EBR until every cell-position has a corresponding hit or no-hit signal (tcp) stored therein.
  • dr-A 132 hit signals are transferred (from a Buffer Register or the like) to the Driver-control registers OBR, EBR.
  • signal pip indicates, in synchronism with the rotation of roll PR and font-row printregistration, firing times when the solenoids may be energized so that their hammers will strike a particular halfrow when it is registered at the locus P-P.
  • signal pip-A indicates the time for solenoid activating which is to print along row a-a), this being conventional in the art.
  • Axes B1, B2 represent the time-occurrence of power (actuation) pulses along busses B-l, B-2 respectively: Fire pulse )fp-1 will be understood as indicating the enabling output from driver HD-l, synchronous with pip-A and tcp-1 (FIGURE 2C) to enable solenoids S1, S3.
  • buss-signal B1 is also high (and B2 is not), solenoid S1 fires printingly (and S3 does not).
  • fp-1 will be understood as indicating the ring of HD-l ⁇ from a hit-bit in cell #1 and understood as owing through S1, though, of course, it will als-o be applied to companion solenoid Sa-likewise for all other fp signals).
  • a typical operational sequence might be as follows. It will be apparent that as half-row a--a (normal character A) approaches the print-locus P-P, a loading pulse Lr-A will cause the loading of hit bits (corresponding to this character A) in registers OBR, EBR. Synchronous with this normal power pulse B1 will go high, Now, it will be apparent that when firing pulse pip-A is applied to gate G1 (in driver circuit HD-1), a firepulse fp-1 will issue (to lfire solenoid S-1 and launch hammer H1) to print an A at print-position #l (column C-l). This must occur within the span of B1.
  • a shift one bit pulse sb1 will ⁇ be applied to registers OBR, EBR to conventionally move the contents of each up one (to the left by one position), thus shifting the rest of the logical hit pulses into coupling-relation with their associated (shared) drivers HD. For instance. such shifting will move tcp-3 (for position 3) from cell #3 to cell #1 (the memory location formerly occupied by tcp-1) so as to be coupled to driver HD-l, the other associated power pulse B2 coming high in synchronism with this.
  • driver HD-1 will issue a firing command fp-3 (to coil Sg) in response to the timing pulse ptp-A (cf. FIGURE 2D also) so that hammer H3 will print during the passage of offset half-row a-a.
  • Printing of A at other print positions will loccur in parallel during their respective sub-cycle and printing of the other characters will be likewise performed, i.e. by half-rows during staggered half-cycles.
  • the duration of pulses would be typically as follows: Lr about 0.1 rns. (millisecond); sb about 1.0 microsecond: fp about 1.3 ms.
  • FIGURE 2B indicates in a rather general way suitable means for implementing thedescribed embodiment, simplifying certain features for clarity and to best illustrate the novel features 3B indicates this in greater detail for a suitable implementation of these features, while FIGURE 3A indicates (schematically and fragmentarily) an associated energizing circuit for a representative driver stage HD-l.
  • FIGURE 3C will indicate to those skilled in the art the typical operative states of the elements in FIGURE 2 as particularized in FIGURES 3A, 3B (in the manner of FIGURE 2D) and yincluding actual representative time values.
  • type carrier means having at least a rst and a second column of spaced type faces arranged thereon in staggered offset form, the type faces of said first column being offset from corresponding type faces of said lsecond column by less than one line space,
  • printing hammer means including a plurality of printing heads positioned in proximity to said print line, a rst printing head being provided -for said first column and a second printing head being provided for said second column, and
  • a shared control circuit means for sequentially operating in one cycle, the printing head for said rst column and the printing head for said second column.
  • a high-speed printer for printing upon a web positioned along a print line including,v
  • continuously movable type roll means having columns of spaced type front members arranged thereon in staggered offset form, the font members of each column being offset from corresponding font members of associated columns by less than one line space,
  • each said driver means being connected in common to all the hammer means of a corresponding set to sequentially operate the hammer means of said set,
  • each said switch means being commonly connected to one hammer means from each set for selective energization thereof, and
  • timing means generating drive signals for controlling the selective energization and sequential operation of said hammer means in response to periods of registration of said font members at the print line.
  • said memory means comprises register means including shift control means for selective coupling of said signals in each set of said cells into controlling relation with its associated driver means at said periods in synchronism with the passage of corresponding portions of said font mem bers so that each of said cells associated with a respective drive means is successively coupled thereto; and wherein are provided S power buss means; each being coupled in common to a given hammer means in each set for conjunctive energization thereof at said associated operating period; each said buss means also being coupled to said timing means for energization thereof at said respective operating time in synchronism with the registration of corresponding columns of said font.
  • each said register comprises a shift-register adapted to step signals S times in font-member synchronism so as to successively shift drive signals into said directly-coupled cell at respective operating periods.
  • said energizing conductors comprise an odd power-bus operatively associated with said odd register, an even powerbus operatively associated with said even register; and wherein are included font-synchronized shift control means for alternately energizing said busses.
  • font-synchronizing timing pulse means connected to each said driver means; and wherein said shift register means include distributor means for lling each register with N hit signals, one for each solenoid, corresponding to a prescribed character printing at a prescribed column, said distributor filling being controlled by said pulse means to correspond with registration of a new associated character-row; and wherein a solid-state three-element switch is provided to energize each said power-bus in synchronism with passage of each said font members.

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  • Engineering & Computer Science (AREA)
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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
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  • Accessory Devices And Overall Control Thereof (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
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DE (1) DE1810089A1 (enrdf_load_stackoverflow)
FR (1) FR1592459A (enrdf_load_stackoverflow)
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628050A (en) * 1969-02-17 1971-12-14 Scm Corp Recorder control circuit
US3633496A (en) * 1970-01-29 1972-01-11 Mohawk Data Sciences Corp Printer and control circuit therefor
US3769907A (en) * 1970-07-24 1973-11-06 Hattori Tokeiten Kk Printing device for selectively printing different groups of figures
US3795186A (en) * 1969-11-14 1974-03-05 Nortec Computer Devices High speed printer
US3848527A (en) * 1972-05-04 1974-11-19 Citizen Watch Co Ltd Printer with rotary roll column selecting means
JPS5340850B1 (enrdf_load_stackoverflow) * 1977-07-11 1978-10-30
US4152981A (en) * 1977-06-03 1979-05-08 Computer Peripherals, Inc. Dual pitch impact printing mechanism and method
USRE30515E (en) * 1978-10-16 1981-02-17 Iomec, Inc. High speed printer
US4393770A (en) * 1980-09-08 1983-07-19 Canon Kabushiki Kaisha Printer with printing drum

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US2111121A (en) * 1936-12-22 1938-03-15 Ibm Printing mechanism
US3097307A (en) * 1955-07-06 1963-07-09 Sperry Rand Corp Opposite conducting type transistor control circuits
US3128693A (en) * 1961-06-09 1964-04-14 Potter Instrument Co Inc High speed printer drum
US3215985A (en) * 1962-03-08 1965-11-02 Anelex Corp Control system for high speed printers
US3240920A (en) * 1961-05-29 1966-03-15 Honeywell Inc Data transmission verifier
US3243665A (en) * 1962-01-26 1966-03-29 Rca Corp Synchronizing arrangement
US3247788A (en) * 1966-04-26 Rotary high speed print drum with staggered type columns
USRE26240E (en) * 1960-11-25 1967-07-18 High speed printers with column spanning hammers
US3332343A (en) * 1966-06-20 1967-07-25 Andelex Corp Selective hammer interposing means in high speed printers
US3366045A (en) * 1965-03-29 1968-01-30 C Olivetri & C S P A Ing Printing device for office machines and data processing equipments

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247788A (en) * 1966-04-26 Rotary high speed print drum with staggered type columns
US2111121A (en) * 1936-12-22 1938-03-15 Ibm Printing mechanism
US3097307A (en) * 1955-07-06 1963-07-09 Sperry Rand Corp Opposite conducting type transistor control circuits
USRE26240E (en) * 1960-11-25 1967-07-18 High speed printers with column spanning hammers
US3240920A (en) * 1961-05-29 1966-03-15 Honeywell Inc Data transmission verifier
US3128693A (en) * 1961-06-09 1964-04-14 Potter Instrument Co Inc High speed printer drum
US3243665A (en) * 1962-01-26 1966-03-29 Rca Corp Synchronizing arrangement
US3215985A (en) * 1962-03-08 1965-11-02 Anelex Corp Control system for high speed printers
US3366045A (en) * 1965-03-29 1968-01-30 C Olivetri & C S P A Ing Printing device for office machines and data processing equipments
US3332343A (en) * 1966-06-20 1967-07-25 Andelex Corp Selective hammer interposing means in high speed printers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628050A (en) * 1969-02-17 1971-12-14 Scm Corp Recorder control circuit
US3795186A (en) * 1969-11-14 1974-03-05 Nortec Computer Devices High speed printer
US3633496A (en) * 1970-01-29 1972-01-11 Mohawk Data Sciences Corp Printer and control circuit therefor
US3769907A (en) * 1970-07-24 1973-11-06 Hattori Tokeiten Kk Printing device for selectively printing different groups of figures
US3848527A (en) * 1972-05-04 1974-11-19 Citizen Watch Co Ltd Printer with rotary roll column selecting means
US4152981A (en) * 1977-06-03 1979-05-08 Computer Peripherals, Inc. Dual pitch impact printing mechanism and method
JPS5340850B1 (enrdf_load_stackoverflow) * 1977-07-11 1978-10-30
USRE30515E (en) * 1978-10-16 1981-02-17 Iomec, Inc. High speed printer
US4393770A (en) * 1980-09-08 1983-07-19 Canon Kabushiki Kaisha Printer with printing drum

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DE1810089A1 (de) 1969-10-23
GB1250500A (enrdf_load_stackoverflow) 1971-10-20

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