US3850279A - Print point positioning control for a character-by-character printer - Google Patents

Print point positioning control for a character-by-character printer Download PDF

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Publication number
US3850279A
US3850279A US00318300A US31830072A US3850279A US 3850279 A US3850279 A US 3850279A US 00318300 A US00318300 A US 00318300A US 31830072 A US31830072 A US 31830072A US 3850279 A US3850279 A US 3850279A
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United States
Prior art keywords
point
output
writing
platen
page
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Expired - Lifetime
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US00318300A
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English (en)
Inventor
R Kolpek
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IBM Information Products Corp
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International Business Machines Corp
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Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US00318300A priority Critical patent/US3850279A/en
Priority to FR7341682A priority patent/FR2211884A5/fr
Priority to JP12983273A priority patent/JPS5437529B2/ja
Priority to DE2361805A priority patent/DE2361805A1/de
Priority to GB5788273A priority patent/GB1424380A/en
Application granted granted Critical
Publication of US3850279A publication Critical patent/US3850279A/en
Assigned to IBM INFORMATION PRODUCTS CORPORATION, 55 RAILROAD AVENUE, GREENWICH, CT 06830 A CORP OF DE reassignment IBM INFORMATION PRODUCTS CORPORATION, 55 RAILROAD AVENUE, GREENWICH, CT 06830 A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL BUSINESS MACHINES CORPORATION
Assigned to MORGAN BANK reassignment MORGAN BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IBM INFORMATION PRODUCTS CORPORATION
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
    • B41J5/00—Devices or arrangements for controlling character selection
    • B41J5/30—Character or syllable selection controlled by recorded information

Definitions

  • ABSTRACT forms simulation display panel is arranged to automatically reposition the print point of a typewriter in response to manual designation by the typist of a desired print point. Information can thus be typed on a form in whatever order is most conveneient to the typist since typing fields can be randomly selected with a minimum of effort.
  • My invention provides the typist with direct access to whatever portion of a form is desired and in whatever order it is convenient to the typist.
  • the typist is provided with a display unit that conveniently will support a blank version of the fomi being typed.
  • the display unit includes sensing devices which respond to the manual designation of the typist of a point on the blank form to automatically move the typewriter print point horizontally and vertically to the point designated by the typist.
  • this device the typist is freed to take raw data in whatever order it is presented and enter it into a form by successively designating the form locations on the display device in the most convenient order.
  • any display unit can be combined with recording means so that any given order of forms positioning can be learned as the operator manually designates the order of typing fields with the first of a series of similar forms.
  • FIG. 1 is a perspective view of a typewriter having a semi-automatic forms positioning display panel constructed in accordance with my invention associated therewith;
  • FIG. 2 is a diagramatic illustration of the typewriter and display panel shown in FIG. 1 together with the control circuitry by which the typewriter is controlled from input from the display panel;
  • FIG. 3 is an enlarged perspective view of the display panel employed in FIGS. 1 and 2;
  • FIG. 4 is an enlargedcross-sectional view of a portion of the display panel shown in FIG. 3 and taken along lines IV IV thereof.
  • serial character-by-character impact page printer or typewriter that can be generally like the well known IBM Selectric I/O Writer as described, for example, in IBM Customer Engineering Selectric I/O Writer Instruction Manual Form/Part No: 241-5159-1 revised Nov. 12, 1962, published by International Business Machines Corporation, Armonk, New York.
  • the typewriter 10 includes well known printing mechanism comprising a type element 11 having character shaped type 12 thereon.
  • the type element 11 together with a page supporting impact resisting platen 13 defines a print point 20.
  • Platen 13 is rotatably supported by bearings 14 in the typewriter frame 15 (see FIG. 2) for vertically moving a page 21 that is carried thereby.
  • the type element 11 is supported on a carrier 16 (see FIG. 2) that is positioned by a lead screw 17 that is different from the escapement mechanism of the Selectric l/O Writer referred to above.
  • Lead screw 17 controls lateral movement of the print point 20 horizontally across the page 21 to define a writing line 22 that extends along the length of platen 13.
  • the typewriter 10 also includes a keyboard having printing control keys 31 and print position moving keys such as a space bar 32, line return key 33, backspace key 34, and line feed key 35. Knobs 36 (see FIGS. 1 and 2) enable manual positioning of the page 21 vertically within the typewriter 10.
  • a forward and reverse line feed or index mechanism 40 is provided which can be substantially like that disclosed in IBM Technical Disclosure Bulletin entitled Forward and Reverse Indexing Mechanism" Volume 10, No. 12, May 1968 at page 1904, published by International Business Machines Corporation, Armonk, New York.
  • the line feed mechanism 40 includes an activating magnet 41 like that employed in the Selectric I/O Writer identified above. Ordinarily, pulsing of magnet 41 produces a single line feed operation. If magnet 41 is held active, the line feed mechanism 40 will simply operate repeatedly.
  • the line feed mechanism 40 also includes a reverse feed select magnet 42 as disclosed in the aforesaid IBM Technical Disclosure Bulletin.
  • reverse feed select magnet 42 When activated, reverse feed select magnet 42 changes the effective output direction of the line feed so that page 21 is fed to move the print point 20 toward the top of the page 21.
  • a more versatile mechanism is obtained if the reverse line feed operates in half step increments and the forward line feed operates in full step increments as disclosed in the aforesaid IBM Technical Disclosure Bulletin.
  • the lead screw 17 is driven through gears 18 and 19 by a direct current, forward and reverse drive motor 50.
  • the carrier 16 thus is positioned along the length of platen 13 by operation of the motor 50.
  • the control for ordinary letter feed and backspace of the print point 20 is not shown since it forms no part of my invention. This control can be accomplished by various techniques known to those skilled in the typewriter arts including, for example, the Selectric continuous or incremental motor control technique disclosed in US. Pat. No. 3,618,738.
  • a detent member 51 is normally engaged with a ratchet wheel 52 on the lead screw 17.
  • electromagnet 53 When seeking a new typing field, electromagnet 53 is activated to withdraw the detent member 51 from ratchet wheel 52 and thereby free the lead screw 17 for movement prior to driving of lead screw 17 by motor 50. Termination of lead screw rotation is followed by release of electromagnet 53 and re-entry of the detent member 51 to again precisely position and hold the lead screw 17.
  • the typewriter provides mechanism capable of positioning the print point 20 horizontally and vertically both in the forward and reverse directions. While a type impact printer has been illustrated, those skilled in the art will recognize that a serial printer operating to produce visible hard copy by other techniques would be equally appropriate.
  • the printing mechanism could employ a controlled ink jet spray, a thermal matrix, or an optical character generator with equal facility.
  • the typewriter 10 is provided with horizontal and vertical motion tranducers 54 and 43 respectively (see FIG. 2) each of which can be similar in theory and operation to that disclosed in US. Patent 3,579,195.
  • the horizontal motion transducer 54 comprises a pulse emitting wheel 55 which generates strobed position and direction information in photosensing mechanism 56 by which displacement of the lead screw 17 in individual character increments is measured.
  • Suitable control circuitry including a counting register provides a digital horizontal print point position sensing device 57.
  • Sensing device 57 stores a seven digit true binary code output that numerically represents the columnar position of print point 20 along the writing line 22.
  • a reset key switch 61 which is conveniently carried by a foremat simulation control panel 60 (FIGS.
  • the vertical motion transducer 43 is substantially identical to transducer 54 and includes an emitter wheel 44, and optical sense mechanism 45. Suitable control circuitry including a counting register provides a digital vertical print point position sensing device 46.
  • Sensing device 46 stores only a 6 digit binary code output which is numerically representative of the writing line position of the page 21 within the typewriter 10.
  • Reset key switch 61 is operative also to set the sensing device 46 to a normal or starting condition upon depression.
  • a page 21 is inserted by the operator to align a fixed position such as a left corner mark 21a on the page 21 with the print point 20.
  • Reset key 61 is depressed to set the horizontal position sensing device 57 and vertical position sensing device 46 to their zero or normalized conditions. Thereafter, all displacement of the print point 20 relative to the page 21 is accounted for in the horizontal and vertical print point position sensing devices 57 and 46 as unit displacement is added or substracted with motion of either the platen 13 or carrier 16.
  • This panel 60 includes a stand or base 62 and a display frame 63 supported thereby and oriented to the convenience of the operator.
  • a probe 64 includes a dobber end 65 that actuates a start switch 66 when depressed to generate a start signal.
  • a flexible cable 67 is connected to the base 62 and includes line 68 (FIG.
  • the frame 63 includes an optically transparent cover plate 69 that is just larger than an ordinary typing page.
  • An opening 63a at the upper end of frame 63 allows insertion of a blank form 21' behind the cover plate 69 where it is held by the frame 63 in an orientation that is convenient to the operator.
  • Openings 63b are provided in the cover plate 69 at each possible character position thereon for guiding the dobber end 65 of the probe 64.
  • Spaced from the cover plate 69 is an elastic membrane 70 (see FIG. 4) onto the back of which is formed or mounted a plurality of horizontal writing line position transducers in the form of electrically conducting bands 71.
  • a mesh or grid 72 separates the horizontal bands '71 from a conductive plating 73 on flexible diaphragm 74. Further plating 75 on diaphragm 74 is separated by grid 76 from vertically oriented columnar position transducer bands 77 carried by a cushion backing member 78.
  • Platings 73 and 75 are connected to a suitable logic level power source 79 (See FIG. 2).
  • a band 71 is provided for each of the possible writing lines 22 on a page 21 and a band 77 is provided for each of the possible columnar positions on a page 21.
  • the bands 71 and 77 thus provide a position detecting cross matrix that is superimposed on a blank form 21, held by the frame 63. The intersections of the cross matrix uniquely identify all the possible print positions on a page 21.
  • a blank form 21 showing the format to be typed is inserted between the transparent cover plate 69 and the membrane 70.
  • the form 21' is thus held visible to the operator.
  • the operator can manually designate a desired point on the form 21' by pressing the dobber end 65 of the probe 64 through a hole 63b against the form 21 to deflect membranes 70 and 74.
  • Electrical contacts are made by the deflection of plating 75 against a vertical band 77 and by deflection of a horizontal band 71 against plating 73 to generate columnar and writing line position indicative signals on individual wires of multiwire cables 80 and respectively.
  • the grids 72 and 76 prevent adjacent bands 71 and 77 from also being closed.
  • the position indicative signals in cables 80 and 90 are delivered to control circuitry including horizontal encode circuitry 81 and vertical encode circuitry 91.
  • the encode circuitry 81 and 91 can take any suitable form known to the art such as, for example, a diode matrix wherein current applied to an individual wire in cables 80 or 90 is distributed by one-way connections through diodes to selected ones of a group of output wires 82 and 92 that are given binary significance to numerically represent the position indicated in the same sense as the output of position sensing devices 57 and 46.
  • the probe 64 as described in US. Pat. No. 3,609,758 closes internal switch 66 when adequate pressure has been exerted on dobber part 65 to insure electrical contact of horizontal conductive bands 71 and vertical bands 77 with their respective source plates 73 and 75. Closing of the probe internal switch 66 generates a signal on line 68 that activates a signal limiting single shot 100 to gate the information encoded on lines 82 and 92 into respective binary registers 83 and 93. As is well known in the art, these registers 83 and 93 are constructed to be over-ridden by whatever information is gated thereinto.
  • the signal on line 68 also sets a start latch circuit 101 to activate an output line 102. The output of start latch 101 is delayed by a delay circuit 103 until the pulse termination output of single shot 100. The start signal then is applied to the horizontal detent control AND circuit 104 and to enabling gates 84 and 94 respectively of horizontal compare circuit 85 and vertical compare circuit 95.
  • Horizontal compare circuit 85 will produce one of three outputs respectively on a forward drive output line 87, a reverse drive output line 88 and the stop drive output line 86. Compare circuit 85 functions to determine whether the binary code presented by horizontal print point position sensing device 57 on lines 58 is greater, less than or equal to the binary code presented by register 83 on lines 89.
  • Motion of the platen 13 is sensed both in magnitude and direction by optical senser 45 which increments the vertical print point position sensing device 46 to continuously update the binary code applied to lines 47.
  • the code applied to lines 47 equals that presented on lines 96
  • the output signal on line feed line 97 is removed and an output signal is applied to vertical feed stop line 98 which is connected to the stop AND circuit 105.
  • a signal applied simultaneously by line 98 and line 86 to stop AND circuit generates an output on line 106 to reset start latch 101 and terminate the operation.
  • a serial page printer having an elongated cylindrical platen for supporting a writing page and character by character printing mechanism positioned adjacent said platen and defining a printing point therebetween, carrier means for movably supporting at least one of said platen and said printing mechanism to enable movement of said printing point along a writing line,
  • a format simulation control panel simultaneously displaying a format simulation area representative of at least a portion of a plurality of writing lines and including columnar position transducing means and writing line position transducing means responsive to manual designation of a point on said panel for generating respective columnar and writing line position indicative signals
  • control means comprising:
  • first encoding means responsive to said columnar position indicative signal for generating a control output that is numerically representative of the columnar location of the manually designated point on said panel
  • second encoding means responsive to said writing line position indicative signal for generating a control output that is numerically representative of the writing line location of the manually designated point on said controlpanel
  • first print point position sensing means having an output that is numerically representative of the current column position of the print point defined by said platen and printing mechanism
  • second print point position sensing means having an output that is numerically representative of the current writing line defined by the rotational position of said platen
  • first compare means for comparing the output of said first print point position sensing means with the output of said first encoding means for operating said forward and reverse drive mechanism to eliminate any difference therebetween
  • said control panel comprises:
  • a display frame for holding a page of paper in a display orientation
  • said columnar position transducing means and said writing line position transducing means form a cross matrix that is supported by said display frame in superimposition with a page of paper held thereby.

Landscapes

  • Handling Of Sheets (AREA)
  • Handling Of Cut Paper (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Control Of Position Or Direction (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
US00318300A 1972-12-26 1972-12-26 Print point positioning control for a character-by-character printer Expired - Lifetime US3850279A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00318300A US3850279A (en) 1972-12-26 1972-12-26 Print point positioning control for a character-by-character printer
FR7341682A FR2211884A5 (enrdf_load_stackoverflow) 1972-12-26 1973-11-14
JP12983273A JPS5437529B2 (enrdf_load_stackoverflow) 1972-12-26 1973-11-20
DE2361805A DE2361805A1 (de) 1972-12-26 1973-12-12 Einrichtung zum einstellen der schreibposition an kraftangetriebenen schreibmaschinen und seriendruckwerken
GB5788273A GB1424380A (en) 1972-12-26 1973-12-13 Printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00318300A US3850279A (en) 1972-12-26 1972-12-26 Print point positioning control for a character-by-character printer

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US3850279A true US3850279A (en) 1974-11-26

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US00318300A Expired - Lifetime US3850279A (en) 1972-12-26 1972-12-26 Print point positioning control for a character-by-character printer

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US (1) US3850279A (enrdf_load_stackoverflow)
JP (1) JPS5437529B2 (enrdf_load_stackoverflow)
DE (1) DE2361805A1 (enrdf_load_stackoverflow)
FR (1) FR2211884A5 (enrdf_load_stackoverflow)
GB (1) GB1424380A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921167A (en) * 1974-06-14 1975-11-18 Ibm Capacitive circuitboard
US4136395A (en) * 1976-12-28 1979-01-23 International Business Machines Corporation System for automatically proofreading a document
US4180335A (en) * 1975-11-30 1979-12-25 Ricoh Company, Ltd. High speed serial printer
US4225249A (en) * 1977-06-27 1980-09-30 International Business Machines Corporation Variable character spacing matrix for proportional spacing printing systems
US4311399A (en) * 1977-02-09 1982-01-19 Sycor, Inc. Method and apparatus for setting and varying margins and line spacing on data printers
US5322376A (en) * 1980-10-31 1994-06-21 Canon Kabushiki Kaishi Serial printing apparatus including an error correcting capability and having a memory
US5562355A (en) * 1980-10-31 1996-10-08 Canon Kabushiki Kaisha Serial printing apparatus with sentence memory and display having correcting means
US5604897A (en) * 1990-05-18 1997-02-18 Microsoft Corporation Method and system for correcting the spelling of misspelled words

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55140452U (enrdf_load_stackoverflow) * 1979-03-29 1980-10-07
EP0658219B1 (en) * 1993-06-01 1999-03-24 Advanced Ceramics Corporation Fluidized bed reactor arrangement for forming a metal carbide coating on a substrate containing graphite or carbon
FR3153496A1 (fr) 2023-10-02 2025-04-04 Intact Procédé de séparation d’une matière céréalière en fractions respectivement enrichies en bêta-glucane, protéines, lipides et amidon.
FR3158018A1 (fr) 2024-01-10 2025-07-11 Intact Boisson végétale de céréale riche en béta-glucane

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US407581A (en) * 1889-07-23 dewey
US655249A (en) * 1898-08-29 1900-08-07 Reinhold Kuebler Telegraphic type-writer.
US729873A (en) * 1901-07-27 1903-06-02 Jules Lagarde Tye-writing or similar machine and apparatus for use in connection therewith.
US761179A (en) * 1903-06-17 1904-05-31 Jacob Pilsatneeks Electrical device for operating the keys of type-writers, &c.
US1519054A (en) * 1921-08-20 1924-12-09 Reynolds Lynus Clyde Tabulating mechanism
US2919782A (en) * 1956-10-05 1960-01-05 Fr D Electronique Et De Cybern Keyboard machine
US2924321A (en) * 1958-06-04 1960-02-09 Alan E Ziskind Remote control typewriter
US3025942A (en) * 1959-06-08 1962-03-20 Olympia Werke Ag Line shifting control arrangement
US3128458A (en) * 1962-05-10 1964-04-07 Romero Adolph Stylus controlled sign with contact grid of parallel plates
US3283871A (en) * 1963-12-18 1966-11-08 Dura Corp Writing system having ordinate and abscissa reader means
US3346853A (en) * 1964-03-02 1967-10-10 Bunker Ramo Control/display apparatus
US3347986A (en) * 1966-10-28 1967-10-17 Bolt Beranek & Newman Data coder and input device
US3380568A (en) * 1966-01-07 1968-04-30 Itt One-two dimension converter control circuit for error correcting typewriter
US3462549A (en) * 1965-12-07 1969-08-19 Int Computers & Tabulators Ltd Data transmisson systems
US3476311A (en) * 1963-02-26 1969-11-04 Alfred P Feldman Two-dimensional structure encoding typewriter
US3523161A (en) * 1966-10-17 1970-08-04 Rca Corp Character selector and generating device
US3579195A (en) * 1968-11-05 1971-05-18 Ibm Data system incorporating method and apparatus for referencing media locations
US3584162A (en) * 1970-02-16 1971-06-08 Ibm Electrical keyboard switch mechanism with improved resilient diaphragm contact actuator
US3609758A (en) * 1969-05-02 1971-09-28 Ibm Keyboard entry device
US3618738A (en) * 1969-11-19 1971-11-09 Ibm Vertical paper feed for a drafting typewriter

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US407581A (en) * 1889-07-23 dewey
US655249A (en) * 1898-08-29 1900-08-07 Reinhold Kuebler Telegraphic type-writer.
US729873A (en) * 1901-07-27 1903-06-02 Jules Lagarde Tye-writing or similar machine and apparatus for use in connection therewith.
US761179A (en) * 1903-06-17 1904-05-31 Jacob Pilsatneeks Electrical device for operating the keys of type-writers, &c.
US1519054A (en) * 1921-08-20 1924-12-09 Reynolds Lynus Clyde Tabulating mechanism
US2919782A (en) * 1956-10-05 1960-01-05 Fr D Electronique Et De Cybern Keyboard machine
US2924321A (en) * 1958-06-04 1960-02-09 Alan E Ziskind Remote control typewriter
US3025942A (en) * 1959-06-08 1962-03-20 Olympia Werke Ag Line shifting control arrangement
US3128458A (en) * 1962-05-10 1964-04-07 Romero Adolph Stylus controlled sign with contact grid of parallel plates
US3476311A (en) * 1963-02-26 1969-11-04 Alfred P Feldman Two-dimensional structure encoding typewriter
US3283871A (en) * 1963-12-18 1966-11-08 Dura Corp Writing system having ordinate and abscissa reader means
US3346853A (en) * 1964-03-02 1967-10-10 Bunker Ramo Control/display apparatus
US3462549A (en) * 1965-12-07 1969-08-19 Int Computers & Tabulators Ltd Data transmisson systems
US3380568A (en) * 1966-01-07 1968-04-30 Itt One-two dimension converter control circuit for error correcting typewriter
US3523161A (en) * 1966-10-17 1970-08-04 Rca Corp Character selector and generating device
US3347986A (en) * 1966-10-28 1967-10-17 Bolt Beranek & Newman Data coder and input device
US3579195A (en) * 1968-11-05 1971-05-18 Ibm Data system incorporating method and apparatus for referencing media locations
US3609758A (en) * 1969-05-02 1971-09-28 Ibm Keyboard entry device
US3618738A (en) * 1969-11-19 1971-11-09 Ibm Vertical paper feed for a drafting typewriter
US3584162A (en) * 1970-02-16 1971-06-08 Ibm Electrical keyboard switch mechanism with improved resilient diaphragm contact actuator

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921167A (en) * 1974-06-14 1975-11-18 Ibm Capacitive circuitboard
US4180335A (en) * 1975-11-30 1979-12-25 Ricoh Company, Ltd. High speed serial printer
US4136395A (en) * 1976-12-28 1979-01-23 International Business Machines Corporation System for automatically proofreading a document
US4311399A (en) * 1977-02-09 1982-01-19 Sycor, Inc. Method and apparatus for setting and varying margins and line spacing on data printers
US4225249A (en) * 1977-06-27 1980-09-30 International Business Machines Corporation Variable character spacing matrix for proportional spacing printing systems
US5322376A (en) * 1980-10-31 1994-06-21 Canon Kabushiki Kaishi Serial printing apparatus including an error correcting capability and having a memory
US5484214A (en) * 1980-10-31 1996-01-16 Canon Kabushiki Kaisha Serial printing apparatus including an error correcting capability and having a memory
US5529406A (en) * 1980-10-31 1996-06-25 Canon Kabushiki Kaisha Document processing apparatus and method for printing a document read out of a memory
US5562355A (en) * 1980-10-31 1996-10-08 Canon Kabushiki Kaisha Serial printing apparatus with sentence memory and display having correcting means
US5690435A (en) * 1980-10-31 1997-11-25 Canon Kabushiki Kaisha Serial printing apparatus with sentence memory and display
US5604897A (en) * 1990-05-18 1997-02-18 Microsoft Corporation Method and system for correcting the spelling of misspelled words
US5765180A (en) * 1990-05-18 1998-06-09 Microsoft Corporation Method and system for correcting the spelling of misspelled words

Also Published As

Publication number Publication date
FR2211884A5 (enrdf_load_stackoverflow) 1974-07-19
GB1424380A (en) 1976-02-11
DE2361805A1 (de) 1974-06-27
JPS5437529B2 (enrdf_load_stackoverflow) 1979-11-15
JPS4996814A (enrdf_load_stackoverflow) 1974-09-13

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AS Assignment

Owner name: MORGAN BANK

Free format text: SECURITY INTEREST;ASSIGNOR:IBM INFORMATION PRODUCTS CORPORATION;REEL/FRAME:005678/0062

Effective date: 19910327

Owner name: IBM INFORMATION PRODUCTS CORPORATION, 55 RAILROAD

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL BUSINESS MACHINES CORPORATION;REEL/FRAME:005678/0098

Effective date: 19910326