US3743073A - Print head shifting mechanism - Google Patents
Print head shifting mechanism Download PDFInfo
- Publication number
- US3743073A US3743073A US00086159A US3743073DA US3743073A US 3743073 A US3743073 A US 3743073A US 00086159 A US00086159 A US 00086159A US 3743073D A US3743073D A US 3743073DA US 3743073 A US3743073 A US 3743073A
- Authority
- US
- United States
- Prior art keywords
- members
- shift
- electromagnets
- print head
- 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
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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
- B41J7/00—Type-selecting or type-actuating mechanisms
- B41J7/54—Selecting arrangements including combinations, permutation, summation, or aggregation means
- B41J7/56—Summation devices for mechanical movements
- B41J7/60—Levers
Definitions
- ABSTRACT An electromagnetically controlled shifting mechanism for aligning one of a plurality of type bands with a printing position.
- the shifting mechanism includes selectively energizable electromagnets that attract a pivotably mounted linkage which is connected to the shaft which supports the print head.
- the electromagnets are located two above and two below the linkage so that by the energization of various combinations of the electromagnets the print head can be shifted between the four horizontal printing bands.
- a shifting mechanism for a print head in a high speed printer wherein four electromagnets operate in conjunction with a linkage mechanism which is attached to the print head to shift the print head by employing various combinations of the electromagnets to place any one of four bands on the print head in a printing position.
- FIG. 1 illustrates an overall side view of the shifting mechanism in conjunction with the print head and part of the print head actuating mechanism.
- FIG. 2 is a plan view of the mechanism of FIG. 1.
- FIG. 3 is a view of the shifting mechanism of FIG. 1 with printing mechanisms removed for clarity.
- FIG. 4 is a plan view of FIG. 3 with a part of the supporting mechanism removed.
- FIG. 5 is a view of the important components of the shifting mechanism with the lowest type band print head in printing position.
- FIG. 6 is a view of the mechanism of FIG. 5 with the type band next to the lowest type band in printing position.
- FIG. 7 is a view of the mechanism of FIG. 5 with the type band next to the highest band in printing position.
- FIG. 8 is a view of the mechanism of FIG. 5 with the highest type band in printing position.
- the construction includes the overall support member l, a supporting and transporting member on which the shifting mechanism 2 of this invention is supported and also on which the printing mechanism 3 and the rotational aligning mechanism (a stepping motor) 4 is positioned.
- This entire mechanism is constructed to be transported horizontally along the printing platen (shown by dotted circle 5). It is supported in this movement by shaft 6, which is part of the supporting structure of the printer and above which it moves by rollers 12 and 13, which ride on rail which is also part of the supporting structure of the printer.
- a Suitable bearing is positioned between the main support 1 and the shaft 6.
- the stepping motor 4 rotates the print head about the axis of shaft 14 as shown in FIG. 2 to align the proper vertical column of letters with the printing portion.
- Suitable mechanism is also provided (not shown) to move the entire mechanism along the platen by a suitable tape and pulley mechanism which is only partially shown by pulleys 16 and 18 and tape 20. This is described in more detail in the aforementioned patents; by pulling the tape the entire printing unit can be shifted along the platen.
- the print head firing mechanism which is an on the fly" printing mechanism consists of many parts which are also not described in this application but are shown in the aforementioned patents.
- tape 22 goes partially around movable pulley 24 and fixed pulleys 23 and 25.
- a yoke 28 is connected from pulley 24 to another yoke 30 by means of pins 32.
- the latter yoke as shown in FIG. 1 holds the print head 35 in position.
- Shaft 14 on which the print head is mounted passes through an opening in this yoke 30.
- the interconnection of yokes 30 and 28 connects pulley 24 to print head 35.
- tape 22 is only pulled a small amount, an insufficient amount to cause the print head to impact against the platen.
- the remaining movement is the free flight movement of yoke 30 and the print head and print head shaft about pivots 42; the printing is thus free flight printing.
- stepping motor 4 rotates shaft 14 to bring the proper column of type faces on the print head 35 into printing position. It will also be noted that there is a suitable ball and socket or other coupling between the stepping motor print shaft and shaft 14. For
- This coupling is located so that the print head and shaft can move in free flight and still be indexed by the stepping motor.
- the previous description has concerned itself with the parts of the printer which are not part of this invention. These parts are, as aforementioned, fully disclosed in US. Pat. Nos. 3,493,091 and 3,461,996.
- the mechanism consists of four electromagnets 51,52, 53, and 54 which coact with a first member, a center linkage 56 and are supported by U shaped members 58, 60, 62, and 64.
- the U shaped members are themselves held in place by being secured to flanges 64 and 66 of main member 1.
- the electromagnets each consist of a copper wire winding around a soft metal core.
- This soft metal core extends from the center of the wire winding to between the U shaped members to which it is attached.
- Suitable nuts and bolts 76 and 78 pass through the U shaped members and through the metal core to aid in holding the electromagnets in position.
- Plastic flanges 80 and 82 are provided below and above the wire windings to help keep the wire in place and prevent the unwinding thereof.
- a suitable insulating tape is provided around the windings for protection, and also electrical leads (not shown) are provided from each of the electromagnets to a power supply to insure their actuation.
- bolt and link arrangements 90 and 92 for supporting springs as will be described hereinafter.
- the bolts fit through a hole in pivoted bars 91. These bars which are pivoted by means of studs 93 which extend from the bar and project through holes in the U shaped members. These bolts have a nut-like link 92 screwed onto their end. Extending from an opening in these bolts to the center linkage are springs 95. These springs are balanced so as to keep the central linkage in a central position spaced equadistantly from the heads 55 of the electromagnets, as will be described in more detail hereinafter.
- the bolt and linkage arrangement provides for increasing or decreasing the tension on each spring so that they remain balanced.
- the center linkage itself consists of a second and third member, two small rectangular members 98 and 100 respectively, each of which are constructed of a magnetically attractable iron and have a main central part 102 and an extending flange 104.
- the springs 95 are connected to these extending flanges by being placed through openings 105 in each of them.
- Second and third members 98 and 100 are each connected to main supporting member 1 by means of pins 106 and 108. These pins fit into fittings 107 and 109 to actually hold them to member 1.
- the pins are connected so as to permit the two smaller members 98 and 100 to pivot in a vertical plane (perpendicular to the paper in FIG. 4) about these pivot pins.
- each of these members 98 and are connected to two long members 110 and 112. These members which are thin in cross sections as shown in FIG. 4 connect the small members 98 and 100 with the shaft 14 on which the print head is mounted.
- Each of these long members is permantly affixed to the two small members 98 and 100 by means of pins 114 and 116. The pins are mounted so that the small members 98 and 100 can rotate in a vertical plane about the pins.
- members 98 and 100 can only be in a vertical plane and is further limited by the two sets of pins, pins 108 and 106, and 114 and 116, and since the former set is fixed to the main member 1 and the latter ones are fixed to the long thin members 110 and 112, members 98 and 100 can move in a limited arcuate matter about pins 106 and 108. It would also be appreciated that since member 1 is stationary with respect to this mechanism, movement of members 98 and 100 will cause the movement of members 110 and 112. This in turn because of the interconnection between these long members and the printing head shaft by means of pins 115 and 116 will cause the vertical movement of the printing head to shift it from one band to the other.
- Pins 115 and 116 fit into a groove in the shaft that supports the printing head. The vertical movement of these pins will cause the corresponding vertical movement of the printing. To permit members 110 and 1 12 to move without having pins 106 and 108, which pass through them, interfere with that movement the pins fit through large oval openings 111 and 113 in the members. This permits sufficient movement of the members without interference from the pins. Also, to provide sufficient strength around these openings the width of the members is expanded around the openings with arcuate sections of material 115 and 117 as shown in FIG. 3.
- the next lowest band of type is aligned as shown in FIG. 6. This is done by the actuation of electromagnets 51 and 52. The actuation of these electromagnets will cause members 98 and 100 to be attracted upwards and thereby cause members l 10 and 1 12 to assume a somewhat horizontal configuration with the part closest to the print head tilted slightly downwardly. This as aforementioned, will cause the next to lowest band of the printing head to be placed in printing position with the platen.
- electromagnets S3 and 54 are actuated. This willcause members 98 and 100 to be attracted downwardly and thereby align members 1 l0 and 112 in a position wherein the part of members 1 10 and l 12 closest to the print head is tilted slightly upwardly with respect to the horizontal. This as aforementioned, will cause the print head to drop slightly down from the position of FIG. 6 so that the next to highest band is aligned with the printing position as shown in FIG. 7.
- a device for shifting a print member between a plurality of type bands comprising:
- a third member pivotably connected to said first member and to said support member so that said second and third members can pivot with respect to said support member and thereby shift said first member
- said second and third members each having one end which is proximate to each other and each having another end which is distal each other, said second and third members being mounted so that their ends proximate each other are respectively pivotably affixed to said support member and their ends 6 distal each other are pivotably connected to said first member, and
- a plurality of electromagnets mounted to attract said second and third members and thereby cause them to pivot about said support member and' thereby cause said first member to shift from one type band to another.
- a device for shifting a print member between a plurality of type bands comprising:
- a second member pivotably connected to said first member and to said support member, for movement in a first plane
- a third member pivotably connected to said first member and to said support member, for movement in said first plane, so that said second and third members can pivot with respect to said support member in the same plane and thereby shift said first member
- a plurality of electromagnets mounted to attract said second and third members and thereby cause them to pivot about said support member and thereby cause said first member to shift from one type band to another, including two pair of opposed electromagnets,
- a second pair of opposed springs connected to said third member and coplanar with said first plane for normally equally biasing the same in opposite directions.
- a device for shifting a print member between a plurality of type bands comprising:
- a third member connected to said first member and to said support member for limited arcuate movement
- said second and third members being moveable with respect to said support member to thereby shift said first member, moveable with respect to said support member, and wherein one end of each of said second and third members being connected to said support solely through said first member, and
- a plurality of electromagnets mounted to attract said second and third members and thereby cause them to move about said support member.
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Abstract
Description
Claims (11)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8615970A | 1970-11-02 | 1970-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3743073A true US3743073A (en) | 1973-07-03 |
Family
ID=22196676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00086159A Expired - Lifetime US3743073A (en) | 1970-11-02 | 1970-11-02 | Print head shifting mechanism |
Country Status (1)
Country | Link |
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US (1) | US3743073A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3941228A (en) * | 1973-06-13 | 1976-03-02 | Firma Precisa Ag. Rechenmaschinenfabrik | Electromagnetically operated printer |
US3952853A (en) * | 1974-10-29 | 1976-04-27 | Litton Business Systems, Inc. | Vertical shift mechanism |
US3977320A (en) * | 1975-03-18 | 1976-08-31 | Pitney-Bowes, Inc. | Electrically controlled postage meter |
FR2306083A1 (en) * | 1975-03-29 | 1976-10-29 | Triumph Werke Nuernberg Ag | Summation link for office machine - maintains self locking position when at rest as long as driving force is inactive |
US4033446A (en) * | 1975-03-20 | 1977-07-05 | Siemens Aktiengesellschaft | Three-position ribbon guide for printer |
US4137514A (en) * | 1977-10-11 | 1979-01-30 | General Electric Company | Control mechanism |
US4410289A (en) * | 1980-09-05 | 1983-10-18 | Alps Electric Co., Ltd. | Serial printer |
US4542998A (en) * | 1983-08-31 | 1985-09-24 | Ncr Corporation | Character set printing means utilizing rolling pressure contact for printing |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1548168A (en) * | 1925-08-04 | Printing telegraphy | ||
US1714334A (en) * | 1927-09-09 | 1929-05-21 | Western Union Telegraph Co | Selecting mechanism for telegraph type-wheel printers |
US2680970A (en) * | 1952-07-28 | 1954-06-15 | Dualex Corp | Mechanical movement |
US2939912A (en) * | 1958-08-29 | 1960-06-07 | Bell & Gossett Co | Alternate tone receiver and method of signal transmission and reception |
US3461996A (en) * | 1966-12-20 | 1969-08-19 | Monroe Int | Reed operated printer |
US3465329A (en) * | 1964-09-28 | 1969-09-02 | Donald J Abel | Digital converters |
US3517124A (en) * | 1967-02-27 | 1970-06-23 | Siemens Ag | Device for adjusting a type carrier in teletype or data teletype machines |
US3605978A (en) * | 1970-02-25 | 1971-09-20 | Kurosawa Telecommunications | Type-selecting mechanism providing visibility of printed characters during function operations |
US3608692A (en) * | 1968-11-22 | 1971-09-28 | Donald J Henry | Selector structure for printing machine |
-
1970
- 1970-11-02 US US00086159A patent/US3743073A/en not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1548168A (en) * | 1925-08-04 | Printing telegraphy | ||
US1714334A (en) * | 1927-09-09 | 1929-05-21 | Western Union Telegraph Co | Selecting mechanism for telegraph type-wheel printers |
US2680970A (en) * | 1952-07-28 | 1954-06-15 | Dualex Corp | Mechanical movement |
US2939912A (en) * | 1958-08-29 | 1960-06-07 | Bell & Gossett Co | Alternate tone receiver and method of signal transmission and reception |
US3465329A (en) * | 1964-09-28 | 1969-09-02 | Donald J Abel | Digital converters |
US3461996A (en) * | 1966-12-20 | 1969-08-19 | Monroe Int | Reed operated printer |
US3517124A (en) * | 1967-02-27 | 1970-06-23 | Siemens Ag | Device for adjusting a type carrier in teletype or data teletype machines |
US3608692A (en) * | 1968-11-22 | 1971-09-28 | Donald J Henry | Selector structure for printing machine |
US3605978A (en) * | 1970-02-25 | 1971-09-20 | Kurosawa Telecommunications | Type-selecting mechanism providing visibility of printed characters during function operations |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3941228A (en) * | 1973-06-13 | 1976-03-02 | Firma Precisa Ag. Rechenmaschinenfabrik | Electromagnetically operated printer |
US3952853A (en) * | 1974-10-29 | 1976-04-27 | Litton Business Systems, Inc. | Vertical shift mechanism |
US3977320A (en) * | 1975-03-18 | 1976-08-31 | Pitney-Bowes, Inc. | Electrically controlled postage meter |
US4033446A (en) * | 1975-03-20 | 1977-07-05 | Siemens Aktiengesellschaft | Three-position ribbon guide for printer |
FR2306083A1 (en) * | 1975-03-29 | 1976-10-29 | Triumph Werke Nuernberg Ag | Summation link for office machine - maintains self locking position when at rest as long as driving force is inactive |
US4137514A (en) * | 1977-10-11 | 1979-01-30 | General Electric Company | Control mechanism |
US4410289A (en) * | 1980-09-05 | 1983-10-18 | Alps Electric Co., Ltd. | Serial printer |
US4542998A (en) * | 1983-08-31 | 1985-09-24 | Ncr Corporation | Character set printing means utilizing rolling pressure contact for printing |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TRIUMPH-ADLER NORTH AMERICA, INC., 500 DAY HILL RO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ROYAL BUSINESS MACHINES, INC.;REEL/FRAME:004509/0292 Effective date: 19860110 |
|
AS | Assignment |
Owner name: TRIUMPH-ADLER AG, FURTHER STRASSE 212, POSTFACH 49 Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TRIUMPH-ADLER NORTH AMERICA, INC.,;REEL/FRAME:004587/0403 Effective date: 19860730 |
|
AS | Assignment |
Owner name: TA TRIUMPH-ADLER AKTIENGESELLSCHAFT, GERMANY Free format text: RE-RECORD OF AN INSTRUMENT RECORDED AUG. 4, 1986 AT REEL 4587, FRAMES 403 TO CORRECT THE NAME OF THE ASSIGNEE;ASSIGNOR:TRIUMPH-ADLER NORTH AMERICA, INC.;REEL/FRAME:004746/0570 Effective date: 19860730 Owner name: TA TRIUMPH-ADLER AKTIENGESELLSCHAFT, FURTHER STRAS Free format text: RE-RECORD OF AN INSTRUMENT RECORDED AUG. 4, 1986 AT REEL 4587, FRAMES 403 TO CORRECT THE NAME OF THE ASSIGNEE.;ASSIGNOR:TRIUMPH-ADLER NORTH AMERICA, INC.;REEL/FRAME:004746/0570 Effective date: 19860730 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES) |