US3653321A - Type mounting means for high speed front printer - Google Patents

Type mounting means for high speed front printer Download PDF

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Publication number
US3653321A
US3653321A US884953A US3653321DA US3653321A US 3653321 A US3653321 A US 3653321A US 884953 A US884953 A US 884953A US 3653321D A US3653321D A US 3653321DA US 3653321 A US3653321 A US 3653321A
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US
United States
Prior art keywords
type
levers
print
document
guide rail
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
US884953A
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English (en)
Inventor
James M Cunningham
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.)
International Business Machines Corp
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International Business Machines Corp
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Filing date
Publication date
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Publication of US3653321A publication Critical patent/US3653321A/en
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Classifications

    • 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
    • B41J9/10—Hammers; Arrangements thereof of more than one hammer, e.g. one for each character position
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/18—Roller bits characterised by conduits or nozzles for drilling fluids
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/007—Drilling by use of explosives

Definitions

  • Each type carrier has a plurality of pivotal levers [56] References cued carrying raised type characters adjacent their free ends. vThe UNITED STATES PATENTS type carrier levers are impacted by selected type hammers in the d1fferent print posltlons to lmpact a document and a r1b- ,1 1 3/1964 bon or the like for printing in selected positions as the type 3,188,946v 15/1965 carriers move by the print positions. 3,224,366 12/1965 v 3,241,480 3/1966 Cunningham 101/93 6 Claims, 4 Drawing Figures PATENTEDA'PR 4 I972 3,653,321
  • This invention is related to the inventions of John E. Drejza et al., application Ser. No. 836,345 (Docket EN968029), filed June 25, 1969, and James M. Cunningham, US. Pat. No. 3,451,335, which issued June24, 1969, and relate to platen structures and control systems therefore for usewith a front printer type carrier of the type disclosed in the subject invention.
  • the invention relates generally to printers and it has reference primarily to front therefore.
  • High speed printers have heretofore. generally been of the back printing type wherein type characters on a chain or drum' printers and a type cartridge.
  • Another object of the invention is to provide a high speed printer in which a plurality of pivotal type carrying members are moved along a rail positioned adjacent a print line on a document and are actuated toward the document to impact the document for printing thereon.
  • Yet another object of the invention is to provide for resiliently biasing a plurality of pivotal type levers on a movable type carrier to a neutral position on the carrier and for providing a predetermined preloading of the biasing means to minimize rebound of the type levers.
  • Still another object of the invention is to provide for pivotally mounting a plurality of type levers on a common pivot and for independently biasing each of them to a neutral position by means of multiple springs positioned in recesses in a common retaining member for the plurality of levers.
  • Yet another object of the invention is to provide for retaining a plurality of movable type carriers on a continuous guide rail on the underside of a base plate by means of a cover plate, so that depending pivotal type levers on the carriers can be impacted by print hammers as they pass different print positions along a print line to impact a carbon ribbon or the like against a document on which a printing operation is to be performed.
  • Another important object of the invention is to provide for so matching the inertias of a plurality of print hammers and type levers with the characteristics of the return springs therefore so that double impact problems between the type and document are minimized.
  • Still another important object of this invention is to provide a front printing type carrier wherein a plurality of type character bearing levers are pivotally supported for being impacted against a document by means of a pivot disposed intermediate their ends, one of which carries a raised type a type carrier, and for utilizing a common hardened insert member to limit rebound wear of the carrier by the type levers.
  • Yet another object of the invention is to provide in a printer having a plurality of pivotal type carrying members moving past a plurality of type hammers, for utilizing a cam surface arrangement between the type carrying members and the print hammers for minimizing'interference between the members and hammers as the type ca rrying members move past the hammers.
  • FIG. 1 is a partial schematic isometric showing of one type of printer apparatus with which the invention may be used.
  • FIG. 2 is an enlarged partly-sectioned schematic cross section view of the print hammer, type cartridge, and platen structure of FIG. 1.
  • FIG. 3 is an enlarged, exploded isometric view of a type carrier such as shown in FIGS. 1 and 2, and
  • FIG. 4 is a schematic partial plan view showing the relationship of the type hammers and type levers in the type cartridge ofFIGS. land 2.
  • FIG. 1 shows a printer apparatus of one type with which the present invention may be used and comprises a TYPE CAR- TRIDGE 10 having a plurality of individual TYPE CAR- RIERS II movable along a continuous path on a STATIONA- RY FRAME or BASE PLATE 12.
  • a portion of the path of the TYPE CARRIERS 11 includes a straight portion along which printing can occur and which hereinafter is referred to as the print line.
  • Each TYPE CARRIER 11 has one or more pivotal TYPE LEVERS 11a with different engraved characters disposed on the surface thereof adjacent the print line.
  • Plural sequences of type characters are obtained by assembling the TYPE CARRIERS 11 in predetermined arrangements on the FRAME or BASE PLATE 12.
  • the type carriers are driven preferably in the form of a train along the FRAME or BASE PLATE 12 so that they travel at a constant velocity and are maintained in abutting relation with each other along the straight portion of the path of travel.
  • the printer apparatus of FIG. 1 is a front printer, but is generally similar to the back printer which is described in US Pat. No. 3,224,366, which issued on Dec. 21, 1965, to J. M. Cunningham and in accordance with the well-known operational principles thereof a PAPER DOCUMENT or FORM 13 is positioned behind an INK RIBBON 14 or the like, which in turn is positioned immediately adjacent a plurality of PRINT HAMMERS 24 located at the various print positions along a straight line to effect impact between the DOCUMENT 13 and various type characters formed on the faces of the TYPE CARRIERS 11 which are described in the Cunningham US. Pat. No.
  • the PRINT I-IAMMERS 24 may be pivotally mounted on a HORIZONTAL SUPPORT ROD 25 (shown in FIG. 2).
  • Operating means for the HAM- MERS 24 may take various form, but preferably include an ELECTROMAGNET 26, ARMATURE 28 pivotally mounted on a SUPPORT PIVOT ROD 29, and an interconnecting movable PUSH ROD 30.
  • SPRINGS 32 bias the HAMMERS 24, PUSH RODS 30, and ARMATURE 28 to a retracted or neutral position when the ELECTROMAGNET 26 is de-energiz'ed.
  • AR- MATURE 28 When the ELECTROMAGNET 26 is energized, AR- MATURE 28 is attracted thereto so as to pivot on PIVOT ROD29.
  • the ARMATURE 28 when pivoting, drives the PUSH ROD 30 and HAMMER 24 forward against the bias of SPRING 32.
  • the stroke of the ARMA- TURE 28 is limited by the core of the ELECT ROMAGNET 26 so that the PUSH ROD 30 and HAMMER 24 move under their own inertia to strike the TYPE CARRYING LEVERS Ila and cause them to move and impact the RIBBON I4 and DOCUMENT 13 against a PLATEN 23.
  • the INK RIBBON 14 is fed between a pair of rotatable spools represented by SPOOL l inany well-known manner.
  • the PAPER DOCU- MENT 13 is fed upwardly over LOWER and UPPER GUIDE BARS 17 and 18, respectively, by means such as a FORMS FEED TRACTORS l9.
  • TheTRACTORS 19 are connected to suitable drive means such as the MOTOR 22 and PULLEYS 21 whereby the DOCUMENT 13 is fed in a step-like manner under the control of means well-known in the art for advancing the PAPER DOCUMENT 13 each time a complete line of data is printed on-the DOCUMENT 13.
  • FIG. 1 the arrangement is shown generally for a front printer. Details of the type carrier used in the front printer according to the present invention are shown in FIGS. 2 and 3 wherein a TYPE CARRIER 11 is shown having one or more pivotally mounted FINGERS or LEVERS Ila, each with a TYPE CHARACTER 11b on the depending free end of a FINGER Ila.
  • the TYPE CARRIERS 11 are, as described in the Cunningham US. Pat. No. 3,224,366, slidably disposed on a GUIDE RAIL 12a.
  • printing occurs when the TYPE CHARACTERS 11b on the FINGERS or LEVERS Ila of the type carriers 11 impact the RIBBON l4 and PAPER DOCUMENT 13 against the PLATEN 23 associated therewith.
  • the impacting occurs at various print positions along the print line to eventually form a complete line of data.
  • the plurality of PRINT HAMMERS 24 are mounted on their PIVOT ROD 25 beneath the CAR- TRIDGE l0 and in front of the depending type character bearing FINGERS 1 la of the TYPE CARRIERS 11, which are guided by the GUIDE RAIL 12a on the FRAME or BASE PLATE 12.
  • the TYPE CARRIERS 11 are retained on the GUIDE RAIL 12a by a COVER PLATE 12b or the like,
  • the PRINT HAMMERS 24 are arranged to be uniformly spaced so that one PRINT HAMMER 24 occupies each print position along the print line, and the HAMMERS 24 are aligned in a single row parallel to the print line.
  • Each PRINT HAMMER 24 is a part of an individual hammer unit which comprises the ELEC- TROMAGNETS' 26 with ARMATURE 28 and PUSH ROD CONNECTOR ELEMENT 30 with BIAS SPRINGS 32, which maintain the HAMMERS 24 out of contact with the TYPE FINGERS 110, when the ELECTROMAGNET 26 is de-energized.
  • Each HAMMERv 24 is individually operable, and the operation of the various HAMMERS 24 occurs selectively at random positions along the print line in accordance with the instructions from suitable control means (not shown), which comprises a type tracking device and a co-acting storage device which indicates the particular data to be printed. Further details of a suitable control system may be more fully understood by a referenceto US. Pat. No. 2,993,437 of F. M. Demer and E. J. Grenchus for a High Speed Printer, which issued July 25,196l.
  • the TYPE CARRIER 11 comprises a substantially inverted chair-shaped body having a rectangular-shaped CHANNEL 1 1c defined by LEG PORTIONS 11d and Ile to receive the GUIDE RAIL 12a, along which the CARRIER 11 is disposed to be moved.
  • the lower seat or PLANE SURFACE l 1 f of the body portion of the TYPE CARRIER 11 is disposed in close relation with the UPPER SURFACE 12c of the COVER PLATE 12b, which operates to retain the CARRIERS 11 on the GUIDE RAIL 12a.
  • GEAR TEETH 15 are provided for mating with corresponding teeth on driving gears (not shown) as described in detail in the Cunningham US. Pat. No. 3,224,366.
  • a number of PARALLEL SLOTS 1 1h are provided in side-by-side spaced-apart relation on the TYPE CARRIER 11 to accommodate a TYPE CARRYING LEVERS 11a.
  • ATRANSVERSE PIVOT PIN 111' extends through an OPENING llj intersecting with SLOTS 11h for pivotally supporting the TYPE LEVERS Ila.
  • a TRANSVERSE RECESS 11k to the rear of the SLOTS 1 1h accommodates a generally rectangular-shaped RETAINER MEMBER 111 having a pluralityof RECESSES 11m aligned with the different TYPE LEVERS 1 laforreceiving SPRINGS I In, 1 10, which are used to maintain the TYPE LEVERS 11a in a neutral or restored position.
  • the RETAINER MEMBER 1 11 may be formed of a suitable resilient plastic material to absorb some of the stored energy of the type levers, and function to dampen their operation and prevent rebound, if desired.
  • the TYPE LEVERS 1111 had an inertia of'3.58 10 in lb sec the TYPE HAMMER 24 an inertia of l6.l5 10 in lb sec and the TYPE SPRINGS Iln, had a cumulative spring rate and preload assumed to be acting as a single spring at 0.188 inches from the PIVOT I II at a rate of 1 l3 lb/in. to lb/in. with a preload of 1.1 lb. to 1.4 lb.
  • the striking FACE 24a of the HAMMER 24 is provided with one or more INCLINED CAM SURFACES 24b adjacent either edge, while the corresponding rear face of the TYPE LEVER 11a may also be provided with one or more INCLINED CAM SURFACES Ilr adjacent the opposite edges.
  • These cam surfaces are disposed to cooperate or interact and provide for a rapid return of the TYPE HAMMER 24 to its neutral position after striking a TYPE LEVER 11a, so as to minimize interference between the TYPE HAMMER 24 and an adjacent TYPE LEVER 110, as the TYPE LEVERS 1 la move past the HAMMERS 24 along the print line.
  • this invention provides a simple and effective type cartridge for a front printer in which a plurality of character bearing type levers may be selectively impacted as they pass a particular print position to impact a document and a ribbon against a suitable platen for printing on the document.
  • a plurality of pivotal type levers which are spring-loaded to a neutral position, and are selectively impacted by pivotal type hammers as they pass the print positions, shadow printing is reduced to a minimum, and long life of the type levers and print hammers is obtained by minimizing interference therebetween as the type levers move past the print hammers.
  • a platen positioned to define a print line of said document
  • a type cartridge comprising a support member positioned in spaced relation with said platen to provide space therebetween for said document and having a continuous guide rail secured to said support member on one side,
  • said type cartridge including also a train of a plurality of individual type carriers mounted on and movable along said guide rail with each of said type carriers having a pivot shaft secured thereto with at least one type lever pivotally mounted thereon adjacent one end of said type lever so as to be pivotally movable in a direction transversely of said guide rail and having a raised type character thereon adjacent the other end of said lever positioned in close proximity to said document and platen,
  • said support member havinga cover plate secured thereto onthe same side as said guide rail and having an edge portion positioned in spaced relation with said support member and extending over'a portion of each of said type carriers in overlapping relation therewith to retain said type carriers on said guide rail, and
  • print hammer means located adjacent said other ends of 7 said type levers operably to engage said type levers and actuate them toward said platen to impact said document against said platen.
  • biasing means comprising a spring individual to each said type lever with said springs being located in recesses in a common carrier member mounted in said type carrier and matched with the masses of the type levers and print hammers so as to minimize rebound of the type levers and double printing.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
US884953A 1969-12-15 1969-12-15 Type mounting means for high speed front printer Expired - Lifetime US3653321A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88495369A 1969-12-15 1969-12-15
US88720369A 1969-12-22 1969-12-22

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US3653321A true US3653321A (en) 1972-04-04

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US884953A Expired - Lifetime US3653321A (en) 1969-12-15 1969-12-15 Type mounting means for high speed front printer
US887203A Expired - Lifetime US3640217A (en) 1969-12-15 1969-12-22 Print hammer control means for pivotally mounted-type members

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Application Number Title Priority Date Filing Date
US887203A Expired - Lifetime US3640217A (en) 1969-12-15 1969-12-22 Print hammer control means for pivotally mounted-type members

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US (2) US3653321A (de)
CH (2) CH512790A (de)
FR (1) FR2072167A5 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742848A (en) * 1971-12-15 1973-07-03 Teletype Corp Endless carrier printer
US4196667A (en) * 1977-03-23 1980-04-08 Kabushiki Kaisha Suwa Seikosha Print hammer for line printer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919933A (en) * 1973-10-05 1975-11-18 Potter Instrument Co Inc High speed printer

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144821A (en) * 1960-10-06 1964-08-18 Ibm Printer apparatus having print force control
US3188946A (en) * 1962-12-31 1965-06-15 Ibm Hammer control mechanism for record marking machine
US3224366A (en) * 1963-03-28 1965-12-21 Ibm Type carrier device
US3241480A (en) * 1963-03-28 1966-03-22 Ibm Print hammer mechanism and pressure control means in high speed printers
US3343482A (en) * 1965-04-14 1967-09-26 Burroughs Corp Automatically controlled printer for printing and coding documents
US3354816A (en) * 1966-09-19 1967-11-28 Ibm Line printer with proportional spacing control means
US3359921A (en) * 1964-07-25 1967-12-26 Ibm Print hammer unit for high speed printers
US3379125A (en) * 1967-01-25 1968-04-23 Potter Instrument Co Inc Type slug impact control in high speed chain printers
US3416442A (en) * 1967-06-20 1968-12-17 Ibm Selective hammer actuating means in chain printers
US3451335A (en) * 1967-08-21 1969-06-24 Ibm Printer platen control system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157035A (en) * 1936-09-05 1939-05-02 Ibm Printing mechanism
US2951439A (en) * 1958-02-07 1960-09-06 Ibm Printing unit for a high speed printer

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144821A (en) * 1960-10-06 1964-08-18 Ibm Printer apparatus having print force control
US3188946A (en) * 1962-12-31 1965-06-15 Ibm Hammer control mechanism for record marking machine
US3224366A (en) * 1963-03-28 1965-12-21 Ibm Type carrier device
US3241480A (en) * 1963-03-28 1966-03-22 Ibm Print hammer mechanism and pressure control means in high speed printers
US3359921A (en) * 1964-07-25 1967-12-26 Ibm Print hammer unit for high speed printers
US3343482A (en) * 1965-04-14 1967-09-26 Burroughs Corp Automatically controlled printer for printing and coding documents
US3354816A (en) * 1966-09-19 1967-11-28 Ibm Line printer with proportional spacing control means
US3379125A (en) * 1967-01-25 1968-04-23 Potter Instrument Co Inc Type slug impact control in high speed chain printers
US3416442A (en) * 1967-06-20 1968-12-17 Ibm Selective hammer actuating means in chain printers
US3451335A (en) * 1967-08-21 1969-06-24 Ibm Printer platen control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742848A (en) * 1971-12-15 1973-07-03 Teletype Corp Endless carrier printer
US4196667A (en) * 1977-03-23 1980-04-08 Kabushiki Kaisha Suwa Seikosha Print hammer for line printer

Also Published As

Publication number Publication date
CH524201A (de) 1972-06-15
FR2072167A5 (de) 1971-09-24
US3640217A (en) 1972-02-08
CH512790A (de) 1971-09-15

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