US3364852A - High-speed print drum with traveling print hammer - Google Patents

High-speed print drum with traveling print hammer Download PDF

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Publication number
US3364852A
US3364852A US507289A US50728965A US3364852A US 3364852 A US3364852 A US 3364852A US 507289 A US507289 A US 507289A US 50728965 A US50728965 A US 50728965A US 3364852 A US3364852 A US 3364852A
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US
United States
Prior art keywords
hammer
drum
character
print
column
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
Application number
US507289A
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English (en)
Inventor
Robert A Ragen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Friden Inc
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Friden Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Friden Inc filed Critical Friden Inc
Priority to US507289A priority Critical patent/US3364852A/en
Priority to GB44162/66A priority patent/GB1109550A/en
Priority to DE19661524367 priority patent/DE1524367A1/de
Priority to NL6615821A priority patent/NL6615821A/xx
Application granted granted Critical
Publication of US3364852A publication Critical patent/US3364852A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/02—Hammers; Arrangements thereof
    • B41J9/04—Hammers; Arrangements thereof of single hammers, e.g. travelling along printing line
    • 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

Definitions

  • a high-speed printer made in accordance with this invention includes a rotary drum 10, made of hardened steel, for example, mounted to a shaft 12 which is rotatably driven by a constant speed motor (not shown).
  • each character 1 column 16 The symbols in each character 1 column 16 are positioned to occupy less than 180 or porate a support for carrying characters or symbols to be imprinted, a hammer means for striking selected characters, a paper or record medium disposed adjacent to and between the character carrier and hammer for registering imprints, and drive means for imparting relative motion between the several elements.
  • Each known apparatus encounters diiferent problems, such as an overabundance of mechanical and electronic parts with attendant complexity and wear and tear, resulting in expensive maintenance, repair and replacement, and loss of operating time.
  • An object of this invention is to provide a high-speed automatic printer that is simple in structure, relatively inexpensive, and easy to control.
  • Another object of this invention is to provide a highspeed automatic printer that affords less type wear, and a minimum of operating noise.
  • a high-speed automatic printer comprises a rotary drum that supports a plurality of columns of characters on its periphery or surface, and a print hammer means that traverse the rotating drum for striking characters selected from the column sequentially.
  • the movable print hammer spans two adjacent column positions, and during operation, the hammer is moved across the surface of the drum parallel to the drum axis at a substantially constant speed. Blank spaces in the form of blank columns or other patterns are interposed between the character columns or characters to allow the hammer to reset for potentially striking any character of each group, for each axial sweep across the rotating drum surface.
  • one character from each columnar group may be selected seriatirn to achieve printing of data or information which is supplied from a transmitter or storage means, for example.
  • FIG. 1 is a plan view, partly in block, of a high-speed automatic printer, in accordance with this invention
  • FIG. 2 is a side elevational view of part of the inventive apparatus of FIG. 1;
  • FIG. 3 is a representation of an arrangement of charac ters and symbols, including decimals, that may be used with the inventive apparatus.
  • FIG. 4 is a representation of an alternative array of characters and symbols, partly broken away, useful with the present invention.
  • a print hammer mechanism 20 is located in juxtaposition to the drum 10 with a paper 22 or other recording medium secured therebetween.
  • the print hammer 20 has a striker head with a width less than the combined width of two columns, but greater than the width of one column.
  • An ink ribbon 24 is also disposed between the print hammer 20 and paper 22 to afford imprinting upon the striking of the hammer 20 against a raised character 14. Both the paper 22 and ink ribbon 24 may be separately transported relative to the drum and hammer by conventional supply and takeup means. With some presently known types of paper, the ink ribbon is not required for the printing process.
  • the print hammer 25 is supported by a carriage 26 that is driven longitudinally at substantially constant speed by means of an endless belt 28 carrying a pin 30, the pin being shown at start line" position in solid lines in FIG. 1 and at end-of-line position indicated by phantom line 30p.
  • the belt 28 is rotated at substantially constant speed by a pair of similar pulley wheels 32 and 32a which' are shaft-driven by a constant speed motor (not shown).
  • the carriage 26 may be moved along a path parallel to the axis of the drum 10 by means of fixed longitudinal guides or shafts (not shown).
  • the pin 30 engages the carriage 26 at the start position, indicated by solid lines in FIG. 1, and propels the carriage in a direction parallel to the axis of .the drum 12 to the end position, indi-catedby phantom tion 26p, ter column to be printed.
  • start position the carriage 26 at the start position, indicated by solid lines in FIG. 1, and propels the carriage in a direction parallel to the axis of .the drum 12 to the end position, indi-catedby phantom tion 26p, ter column to be printed.
  • the start line position is determined so that the print hammerhead is in substantial alignment with the first two columns, i.e., the first character column and the first blank space column; while for the end-of-line posithe hammerhead is aligned with'the last characcarriage 26 is at rest, and is accelerated from zero velocity to the velocity of the endless belt 28.
  • Such acceleration takes place during a 90 arcuate traverse of the pin 30 wheel 32, and is characterized by a smooth, uniform transition between line print cycles.
  • uniform deceleration of the carriage 26 is afforded by the arcuate travel of the pin 30 around the pulley wheel 32a.
  • a resilient means or spring 34 is extended and tensed.
  • the spring 34- is coupled at one end to a fixed support 36, which may be the frame of the apparatus, and at the other end is looped through an aperture 38 formed in the carriage 26.
  • the selector and actuator mean 40 may include information storage means, such as a shift register controlled by a magnetic tape, which stores predetermined permutations or combinations of binary data representing characters to be read out for printing and display. Suitable timing references, counters, and delay means may be utilized to energize a spring-biased solenoid 42 which allows the hammer 20 to strike a selected character precisely when the drum character is presented to print position. For this purpose, a coded timing wheel and sensing circuits may be utilized in conjunction with the shift register to achieve precise actuation of the striking hammer means relative to the rotation of the character drum.
  • two characters may be printed for every complete revolution or 360 turn of the drum 10.
  • the start print mode begins, one character from the group in the first character column is selected for printing while the drum rotates continuously for less than 180.
  • the hammer is reset while the carriage 26 transports the hammer in the axial direction of the rotating drum 10. Reset occurs as the hammerhead crosses the blank column 18 and approaches the character column 16 following the blank column.
  • the hammer is moved into alignment with the second and third columns, which are respectively the first blank column 18 and second character column 16, and is again ready for striking a selected character from the group in the second character column.
  • This second group of characters 14 is displaced 180 relative to the first group to accommodate the hammer 20 upon arrival.
  • all alternate character groups are displaced in opposite hemispheres of the drum periphery. It is noted that other arrangements of characters are possible within the scope of this invention, such that the displacement of adjacent columnar groups is 90, 120, and so forth.
  • FIG. 3 depicts another arrangement of characters on a drum that lends itself to the printing device of this invention.
  • the characters of each character column 44 are substantially in alignment.
  • each column 46 interposed between the character columns 44 includes a decimal 48 positioned between blank spaces of the character columns. These blank spaces are preferably disposed substantially in the middle of the column character group, between the numerals 4 and 5, as illustrated.
  • the cylinder or drum rotates one full turn for each character column 44 and one 360 turn for each decimal column 46.
  • other symbols 50 may be employed in separate columns 52, as illustrated.
  • FIG. 4 Still another arrangement of characters on a drum surface is shown in FIG. 4, wherein the character columns 54 include a number of blank spaces, preferably the same in number as the print characters. Alternate character columns 54 are spaced by blank columns 56, each of which includes a decimal 58 located approximately midway of the spaces in the blank group of the character column. Different symbols 60 may be employed in one or more separate columns 62. All data characters are preferably in axial alignment or rows, and the blank spaces and decimals are similarly aligned in rows. This format may use one drum revolution per column, since the blank space groups will allow recocking of the hammer and recovery of the driving circuit.
  • a drum having a diameter of 0.7 inch and a column width of .150 inch was used.
  • the hammerhead width was .140 inch, and the longitudinal velocity of the hammer was three inches per second.
  • Rotational drum velocity was 3600 r.p.m., which enabled a print speed of thirty characters per second.
  • the apparatus described herein which includes, inter alia, a rotary character drum and print hammer that traverses the drum axially, is relatively inexpensive, uses a minimum of parts and is easy to maintain. Since the carriage supports only a hammer and its associated actuating parts, the mass being moved is relatively small, which affords less noise and less wear than previously known systems. Also, when compared to a device employing only a single column character wheel, it is seen that the present apparatus benefits from a reduction in type Wear. Furthermore, the circuitry including delays and timing networks, and the mechanical controls are the same for each columnar position, so that the characters in each printed line are accurately positioned linearly. In addition, the use of a single hammer with the same selection and delay circuitry and mechanical controls in lieu of a multiplicity of hammers, each with separate circuitry and parts, greatly reduces the complexity and cost of the presently disclosed printer system.
  • the invention is not limited to the particular embodiment described above.
  • the ink ribbon may be relocated or eliminated as stated heretofore.
  • the hammer need not be restricted to a continuous constant motion, but may be advanced stepwise to each print position, by use of a cam or gear means, if so desired.
  • a high-speed printer apparatus for imprinting characters on a medium comprising;
  • a print hammer located in print relation with said cylindrical member and having a width that spansmore than one said column and less than two said columns,

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Printing Methods (AREA)
US507289A 1965-11-12 1965-11-12 High-speed print drum with traveling print hammer Expired - Lifetime US3364852A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US507289A US3364852A (en) 1965-11-12 1965-11-12 High-speed print drum with traveling print hammer
GB44162/66A GB1109550A (en) 1965-11-12 1966-10-04 High-speed drum printer
DE19661524367 DE1524367A1 (de) 1965-11-12 1966-11-09 Mit hoher Geschwindigkeit arbeitende Druckvorrichtung
NL6615821A NL6615821A (fr) 1965-11-12 1966-11-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US507289A US3364852A (en) 1965-11-12 1965-11-12 High-speed print drum with traveling print hammer

Publications (1)

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US3364852A true US3364852A (en) 1968-01-23

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US507289A Expired - Lifetime US3364852A (en) 1965-11-12 1965-11-12 High-speed print drum with traveling print hammer

Country Status (4)

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US (1) US3364852A (fr)
DE (1) DE1524367A1 (fr)
GB (1) GB1109550A (fr)
NL (1) NL6615821A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433153A (en) * 1967-12-29 1969-03-18 Ibm Printer with swiveling pushrods
US3613574A (en) * 1969-02-10 1971-10-19 Sperry Rand Corp Selective printing means including a rotatable drum having interspersed complementary character sets thereon
US3665850A (en) * 1969-08-25 1972-05-30 New England Merchants National Selective belt printing apparatus for printing a line at a time
US3672297A (en) * 1970-06-30 1972-06-27 Ibm Printing control device in high speed chain printer with hammers movable to plural print positions
US3704666A (en) * 1971-05-03 1972-12-05 Burroughs Corp High speed multiple tape serial printing mechanism
US3750794A (en) * 1970-12-01 1973-08-07 Burroughs Corp High speed print drum with traveling print hammer
US3795300A (en) * 1971-07-23 1974-03-05 Copal Co Ltd Printing machine
US3902419A (en) * 1972-08-19 1975-09-02 Agfa Gevaert Ag Apparatus for applying symbols to webs of photographic material or the like

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757775A (en) * 1953-01-19 1956-08-07 Ibm Single printing element typewriter
US2915967A (en) * 1958-08-06 1959-12-08 Sperry Rand Corp Information reproducing system
US2949846A (en) * 1958-03-28 1960-08-23 Burroughs Corp Printing mechanism
US2993437A (en) * 1959-10-05 1961-07-25 Ibm High speed printer apparatus
US3128693A (en) * 1961-06-09 1964-04-14 Potter Instrument Co Inc High speed printer drum
US3135195A (en) * 1961-06-22 1964-06-02 Potter Instrument Co Inc High speed printer with moving characters and single hammer
US3168182A (en) * 1963-03-21 1965-02-02 David W Bernard Type wheel shifting and impacting means in high speed printers
US3247788A (en) * 1966-04-26 Rotary high speed print drum with staggered type columns
US3253539A (en) * 1963-09-16 1966-05-31 Clary Corp Driving and supporting means for high speed printing drum
US3282205A (en) * 1964-05-19 1966-11-01 Sperry Rand Corp Print control means for high speed printer with traveling print bar
US3282204A (en) * 1964-05-15 1966-11-01 Sperry Rand Corp High speed printing device for printing characters of different physical sizes

Patent Citations (11)

* 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
US2757775A (en) * 1953-01-19 1956-08-07 Ibm Single printing element typewriter
US2949846A (en) * 1958-03-28 1960-08-23 Burroughs Corp Printing mechanism
US2915967A (en) * 1958-08-06 1959-12-08 Sperry Rand Corp Information reproducing system
US2993437A (en) * 1959-10-05 1961-07-25 Ibm High speed printer apparatus
US3128693A (en) * 1961-06-09 1964-04-14 Potter Instrument Co Inc High speed printer drum
US3135195A (en) * 1961-06-22 1964-06-02 Potter Instrument Co Inc High speed printer with moving characters and single hammer
US3168182A (en) * 1963-03-21 1965-02-02 David W Bernard Type wheel shifting and impacting means in high speed printers
US3253539A (en) * 1963-09-16 1966-05-31 Clary Corp Driving and supporting means for high speed printing drum
US3282204A (en) * 1964-05-15 1966-11-01 Sperry Rand Corp High speed printing device for printing characters of different physical sizes
US3282205A (en) * 1964-05-19 1966-11-01 Sperry Rand Corp Print control means for high speed printer with traveling print bar

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433153A (en) * 1967-12-29 1969-03-18 Ibm Printer with swiveling pushrods
US3613574A (en) * 1969-02-10 1971-10-19 Sperry Rand Corp Selective printing means including a rotatable drum having interspersed complementary character sets thereon
US3665850A (en) * 1969-08-25 1972-05-30 New England Merchants National Selective belt printing apparatus for printing a line at a time
US3672297A (en) * 1970-06-30 1972-06-27 Ibm Printing control device in high speed chain printer with hammers movable to plural print positions
US3750794A (en) * 1970-12-01 1973-08-07 Burroughs Corp High speed print drum with traveling print hammer
US3704666A (en) * 1971-05-03 1972-12-05 Burroughs Corp High speed multiple tape serial printing mechanism
US3795300A (en) * 1971-07-23 1974-03-05 Copal Co Ltd Printing machine
US3902419A (en) * 1972-08-19 1975-09-02 Agfa Gevaert Ag Apparatus for applying symbols to webs of photographic material or the like

Also Published As

Publication number Publication date
DE1524367A1 (de) 1970-07-16
NL6615821A (fr) 1967-05-16
GB1109550A (en) 1968-04-10

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