US3595167A - Impact printing mechanism - Google Patents

Impact printing mechanism Download PDF

Info

Publication number
US3595167A
US3595167A US765473A US3595167DA US3595167A US 3595167 A US3595167 A US 3595167A US 765473 A US765473 A US 765473A US 3595167D A US3595167D A US 3595167DA US 3595167 A US3595167 A US 3595167A
Authority
US
United States
Prior art keywords
elements
printing
impact
frame
printing mechanism
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
US765473A
Other languages
English (en)
Inventor
Armin Wirth
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.)
K Tron Patent AG
Original Assignee
Wirth Gallo and Co
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 Wirth Gallo and Co filed Critical Wirth Gallo and Co
Application granted granted Critical
Publication of US3595167A publication Critical patent/US3595167A/en
Assigned to WIRTH GALLO PATENT AG, A SWISS CORP. reassignment WIRTH GALLO PATENT AG, A SWISS CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WIRTH, GALLO AND COMPANY
Assigned to K-TRON PATENT AG. reassignment K-TRON PATENT AG. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE JAN. 20, 1986 Assignors: WIRTH GALLO PATENT AG
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41K—STAMPS; STAMPING OR NUMBERING APPARATUS OR DEVICES
    • B41K3/00—Apparatus for stamping articles having integral means for supporting the articles to be stamped
    • B41K3/02—Apparatus for stamping articles having integral means for supporting the articles to be stamped with stamping surface located above article-supporting surface
    • B41K3/04—Apparatus for stamping articles having integral means for supporting the articles to be stamped with stamping surface located above article-supporting surface and movable at right angles to the surface to be stamped

Definitions

  • the present invention relates to an impact printing mechanism, comprising a printing table, paper guides and type bearing members.
  • Impact printing mechanism are printing mechanisms in which a movable element, such as a type face, is accelerated and strikes a stationary element (such as a cylinder or printing table), the impression (for instance by transfer of ink from an inked ribbon) being produced substantially by the energy stored in the moving element when the latter strikes the stationary element and thereby producing the impression.
  • a movable element such as a type face
  • a stationary element such as a cylinder or printing table
  • a hammer (the typeface and type lever) with a reduced mass of about 6 grams is accelerated.
  • the hammer strikes an anvil (the cylindrical platen and components of the carriage or frame etc. which has at least a hundred times this mass.
  • the impact transfers not more than a ten-thousandth of the energy of the hammer-to the anvil.” This means that the vibrations of said components and of the entire machine due to the impact of the hammer are very small.
  • Price computing printing weighing machines of conven tional kind are of heavy construction. They may be provided with a preferably statically working printing mechanism in which case they operate rather slowly. Possibly the impression is produced in several stages, i.e. parts of the impression, such as the description of the goods, is not printed at the same time as the numerical values, or the maker's name is preprinted on the paper tape. Owing to the generation of noise and the complications of the design, such weighing machines are usually used only as prepacking weighing machines. Printing is effected relatively deep inside the casing, a fact which in turn requires a complicated and time-consuming transportation of the voucher to the outside.
  • the size and power required are to be a minimum, permitting the printing mechanism to combined in a unit together with the setting, computing and display mechanism and mounted on a thin column which occupies little space on a counter and does not obstruct direct vision between the vendor and the purchaser.
  • FIG. I is a first embodiment comprising gliding elements
  • FIG. 2 is a second embodiment comprising contrarotating elements
  • FIG. 3 is a third embodiment with corotating elements
  • FIG. 4 is a fourth embodiment with rotating elements whose center of gravity is in the axis of rotation.
  • FIG. 5 is a modification of said fourth embodiment.
  • this shows the frame 1 of one embodiment of the proposed printing mechanism.
  • This frame 1 contains two substantially like elements 2 and 3 of equal mass. Each is formed with a projection 4 provided with rack teeth 5. A bore 6 inside the projection 4 contains a spring 7 which extends into a bore 8 in the second element. The two sets of rack teeth 5 mesh with a pinion 9 on a shaft 10 mounted in the frame 1.
  • the elements 2 and 3 are formed with recesses 11 which are of such a size that the centers of gravity of the two elements 2 and 3 move along a straight path A-A intersecting the shaft 10 parallel to two guiding surfaces 12 and 13.
  • the element 3 has a further recess 14 containing a spring 15 which bears against the rear wall 16 of the frame 11.
  • a lever 17 formed with a tooth 18 is pivotably attached to the frame l and biased by a spring 19 in the clockwise direction.
  • the left-hand end of the frame 1 forms a printing table 20 supporting a type block 21.
  • the paper tape that is to be printed upon is inserted into a slot 22.
  • the shaft 10 couples the pinion 9 to a cocking mechanism not shown in the drawing and for transferring the mechanism into a position ready for printing the pinion is rotated clockwise.
  • the tooth I8 snaps into engagement and retains the two elements 2 and 3 in these positions.
  • the lever 17 is simply depressed against the action of spring I9. The springs7 will then accelerate the two elements 2 and 3 outwards.
  • the end face of element 2 strikes the type block 21 and an impression is made on the tape.
  • the two springs 7 In their decompressed state the two springs 7 still provide slight freedom of movement which is taken up by the much weaker spring 15 which after impact slightly retracts the two elements 2 and 3 inwards to permit the paper tape to be withdrawn.
  • the masses of the two elements 2 and 3 and their motions are completely alike.
  • the forces required for accelerating the two elements 2 and 3 are continuously equal and since they act in contrary directions their reactions cancel each other out.
  • the algebraic sum of the momenta of the two elements is nul during their motion and at the instant of impact. As the elements 2 and 3 are not rotating the algebraic sum of the moments of their momenta is also always nul.
  • the two elements 102 and 103 have the form of double-armed levers. Each lever is fulcrumed on a shaft 23.
  • the two shafts 23 are mounted in a frame 101 and they are coupled with a cocking mechanism not shown in the drawing.
  • the shorter lever arms 24 of the two elements 102 and 103 have the form of toothed sectors 25 which are in permanent mesh.
  • One end of a leaf spring 26 engages a notch 27 in the element 103, whereas its other end engages a notch 28 in the frame 101.
  • a tension spring 29 connects the two elements 102 and I03. This spring opposes the elastic thrust of the leaf spring 26.
  • a pawl 31 is mounted on the front wall 30 of the frame I01.
  • This pawl 31 is biased in anticlockwise direction by a spring 32 and extends through a gap 33 in the front wall 30.
  • a type block is affixed to a printing table 20 affixed to the frame 101.
  • type wheels 34 are mounted on a shaft 35. These are set according to the variable measured and/or input quantity.
  • a roll of paper tape 36 is likewise mounted in the frame 101 and delivers the paper tape 37. The tape runs between the typewheels 34, the type block 21 and the element 102 to an exit slot 22.
  • a cutter mechanism not shown in the drawing permits the paper tape to be cut at the same time as the impression is produced or immediately afterwards. The disposition of an inking ribbon and of the paper feed is conventional, and these elements have been omitted to avoid complication.
  • the mechanism is transferred into position ready for printing by deflecting the two elements 102 and 103 in contrary directions against the resistance of the leaf spring 26 by the cocking mechanism.
  • the two elements 102 and 103 will then assume the positions 1020 and 103a, indicated in a dot-dash lines and the leaf spring 26 will be in position 260.
  • the pawl 31 engages and retains the two elements 102 and 103 in this deflected position.
  • the typewheels 34 are set and the paper feed started.
  • In order to achieve printing pawl 31 is released at the desired instant.
  • the two elements 102 and 103 are so designed that, in printing position, the radii of their centers of gravity 38 are equal and perpendicular to the line connecting the two shafts 23.
  • the length of the arms 24 is so chosen that the kinetic energy of both elements 102 and 103 is substantially identical.
  • the algebraic sum of the momenta of the two elements and that of the moments of their momenta are nul at the instant of impact.
  • the two elements 202 and 203 are mounted on shafts 39.
  • a leaf spring 26 extends between a notch 27 in the element 203 and a notch 28 in the frame 201.
  • the two elements 202 and 203 are coupled by two links 40 which are themsleves attached to the frame I by another link 41.
  • the three links are all hinged on a common hinge pin 42.
  • the other components correspond to similar components in FIG. 2, the paper roll and the pawl being omitted for the sake of simplicity. Again in this embodiment the algebraic sum of the momenta of the two elements and that of the moments of their momenta is nil in printing position.
  • FIG. 4 shows yet another embodiment in which the element 302 is a lever, whereas the element 303 is a cylinder.
  • the centers of gravity of both elements coincide with the centers of two shafts 39.
  • the two elements 302 and 303 have intermeshing toothed sectors 25.
  • the cocking spring and the pawl are algebraic sum of the moments of their momenta is nil. Since the centers of gravity of the two elements coincide with their fulcra, the algebraic sum of their momenta is likewise nil.
  • the impression is produced between a printing table and one element.
  • the impression might also be produced between the two elements.
  • This possibility is schematically illustrated in FIG. 5.
  • the two elements 402 and 403 are deflectably mounted on their respective shafts 39. It is assumed that the masses of the two elements 402 and 403 are equal and equally distributed, so that the path lengths of the printing surfaces 43 are likewise equal.
  • the type faces 44 are provided on a bar 44 which is adjusted according to the particular character that is to be printed. Instead of a bar 44 printing blocks might be provided.
  • the bar 44 is yieldingly held for instance by a small spring force approximately midway between the two impact surfaces 43. For creating the impression the bar is impacted simultaneously from each side by the two impact faces 43.
  • the type bar is a low mass element which may consist for instance of polyamide.
  • FIGS 2 and 4 illustrate the use of a paper tape withdrawn from rolls.
  • the paper may be provided in the form of a paper pile, or a weigh card may be inserted for each weighing.
  • An impact printing mechanism comprising in combination a frame, a printing surface, a type bearing member, a plurality of elements movably mounted within said frame, said elements coupled to each other with one degree of freedom, said type bearing member being mounted between said printing surface and said movable elements, and means causing a first one of said movable elements to strike said type bearing member and a second one of said movable elements to move simultaneously with said first one of said movable elements and with substantially the same inertial force substantially the same distance in a substantially opposite direction from said first element and away from said type bearing member.
  • An impact printing mechanism according to claim 1, further comprising means to retract said first movable element from said printing position.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Rotary Presses (AREA)
  • Handling Of Sheets (AREA)
US765473A 1968-01-11 1968-10-07 Impact printing mechanism Expired - Lifetime US3595167A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH58668A CH485203A (de) 1968-01-11 1968-01-11 Schlagdruckwerk, insbesondere für preisrechnende Ladenwaagen

Publications (1)

Publication Number Publication Date
US3595167A true US3595167A (en) 1971-07-27

Family

ID=4190418

Family Applications (1)

Application Number Title Priority Date Filing Date
US765473A Expired - Lifetime US3595167A (en) 1968-01-11 1968-10-07 Impact printing mechanism

Country Status (6)

Country Link
US (1) US3595167A (nl)
CH (1) CH485203A (nl)
DE (1) DE1774726C3 (nl)
FR (1) FR1603083A (nl)
GB (1) GB1239772A (nl)
NL (1) NL152795B (nl)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027591A (en) * 1975-03-26 1977-06-07 Hans Gubela Apparatus for positioning a pad or book of sheets on the work table of printing apparatus
US4179989A (en) * 1976-04-26 1979-12-25 Kabushiki Kaisha Sato Kenkyusho Constant printing pressure mechanism for portable label printing and applying machine, or the like
US5848401A (en) * 1995-12-22 1998-12-08 Goldberg; Robert M. Hand-held portable postage meter that uses pre-printed tape

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687088A (en) * 1948-08-30 1954-08-24 Durant Mfg Co Printing recording counter
US2895411A (en) * 1956-12-27 1959-07-21 Ibm High speed printer
US2922361A (en) * 1957-11-01 1960-01-26 Toledo Scale Corp Printer
US3094064A (en) * 1960-01-04 1963-06-18 Ibm Positioning mechanism in selective type printing machines
US3152540A (en) * 1961-09-18 1964-10-13 Holley Comp Products Company Hammer mechanism
US3308749A (en) * 1965-05-24 1967-03-14 Ibm Print impression control for specially configured type elements

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687088A (en) * 1948-08-30 1954-08-24 Durant Mfg Co Printing recording counter
US2895411A (en) * 1956-12-27 1959-07-21 Ibm High speed printer
US2922361A (en) * 1957-11-01 1960-01-26 Toledo Scale Corp Printer
US3094064A (en) * 1960-01-04 1963-06-18 Ibm Positioning mechanism in selective type printing machines
US3152540A (en) * 1961-09-18 1964-10-13 Holley Comp Products Company Hammer mechanism
US3308749A (en) * 1965-05-24 1967-03-14 Ibm Print impression control for specially configured type elements

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027591A (en) * 1975-03-26 1977-06-07 Hans Gubela Apparatus for positioning a pad or book of sheets on the work table of printing apparatus
US4179989A (en) * 1976-04-26 1979-12-25 Kabushiki Kaisha Sato Kenkyusho Constant printing pressure mechanism for portable label printing and applying machine, or the like
US5848401A (en) * 1995-12-22 1998-12-08 Goldberg; Robert M. Hand-held portable postage meter that uses pre-printed tape

Also Published As

Publication number Publication date
DE1774726A1 (de) 1972-01-27
DE1774726B2 (de) 1974-09-19
DE1774726C3 (de) 1975-05-15
NL152795B (nl) 1977-04-15
NL6812572A (nl) 1969-07-15
CH485203A (de) 1970-01-31
FR1603083A (nl) 1971-03-15
GB1239772A (en) 1971-07-21

Similar Documents

Publication Publication Date Title
US3595167A (en) Impact printing mechanism
US2870897A (en) Electrically operated text writing device for bookkeeping machines
US3482511A (en) Printing arrangement with tabulated printing cylinder
US3732812A (en) Differentially positionable type wheels in remotely controlled print modules
US2165223A (en) Power-operated typewriter
US3221644A (en) Printing device with zero suppressing means
US3908543A (en) Dating device for printers
GB883156A (en) Character recording apparatus
US3218965A (en) Pressure control means for print hammers
US2208050A (en) Cash register
US2089447A (en) Dual printing mechanism for computing machines and the like
US2506702A (en) Variable feed mechanism for typewriters or the like
US3598046A (en) Print hammer interposer and actuating means in flying printers
USRE27542E (en) High speed serial printing device for teleprinters, accounting machines and data processing equipment
US3795300A (en) Printing machine
GB746964A (en) A page printing machine
GB2048782A (en) Character ring printer
US3850098A (en) Plural high-speed printing apparatus
US1045258A (en) Adding-machine.
US1925344A (en) Combined type writing
US1950761A (en) Typewriting machine
GB1248248A (en) Printer
US1012785A (en) Type-writing machine.
US1858027A (en) Combined typewriting
US773567A (en) Type-writer.

Legal Events

Date Code Title Description
AS Assignment

Owner name: WIRTH GALLO PATENT AG, SONNENBERGSTRASSE 55, ZURCH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WIRTH, GALLO AND COMPANY;REEL/FRAME:004185/0949

Effective date: 19831014

AS Assignment

Owner name: K-TRON PATENT AG.

Free format text: CHANGE OF NAME;ASSIGNOR:WIRTH GALLO PATENT AG;REEL/FRAME:004583/0338

Effective date: 19860122