US3311050A - Pressure wave actuating means for type hammers in high speed printers - Google Patents

Pressure wave actuating means for type hammers in high speed printers Download PDF

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Publication number
US3311050A
US3311050A US410665A US41066564A US3311050A US 3311050 A US3311050 A US 3311050A US 410665 A US410665 A US 410665A US 41066564 A US41066564 A US 41066564A US 3311050 A US3311050 A US 3311050A
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US
United States
Prior art keywords
hammer
high speed
printing
space
pressure wave
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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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US410665A
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English (en)
Inventor
Schmidt Siegfried
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.)
US Philips Corp
North American Philips Co Inc
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US Philips Corp
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Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers

Definitions

  • the printing operation is a shock process. Its duration is the time during which a force acts between the hammer and the type. This time must be so short that the type may he regarded as stationary during this action period. If the character form during this period moves on over a greater length a vague print results. To arrive at short action periods for a given required printing force, the mass of the hammer must be as small as possible and its speed as high as possible.
  • the hammer In conventional mechanical printing systems the hammer is driven by an electromagnet through a rod system or by a toothed wheel. The hammer speeds obtainable are then limited by the inertia of the rod system or by the maximum permissible peripheral speed of the toothed wheel.
  • the present invention relates to a method of printing or stamping and is characterized in that the printing or stamping operation is brought about by a pressure wave released or generated through an electric discharge.
  • the new high-speed printer is also suitable for embossing such as used, for example, in the manufacture of multiplicator matrices and Braille script. Further the transport of the material to be printed maytake place very rapidly.
  • FIG. 1 shows a partial section of an electrical impulse actuated printing structure.
  • FIG. 2 shows a partial section actuated embossing structure.
  • FIG. 3 shows a partial section of an electrical impulse actuated printing structure utilizing a hammer surface.
  • FIG. 4 shows a partial section of an electrical impulse actuated printing structure utilizing a hermetically sealed hammer.
  • FIGURE 1 shows the principle of a device for flying printing with the aid of a gas pressure wave produced by a spark.
  • Electrodes 1 are held by an insulator 2 and extend into a discharge space 3' which may be filled, if desired, with a gas at a pressure above atmospheric pressure.
  • the spark is produced by, for example, the discharge of .a capacitor.
  • the initiation of the discharge may be obtained in different ways.
  • an additional igniting electrode 4 is provided.
  • the electrodes 1 are directly connected to a capacitor 5 which contains the necessary energy to be released in the spark.
  • the discharge of the capacitor 5 through the electrodes 1 is initiated by a high-tension pulse at the igniting electrode 4.
  • This discharge produces a gas-pressure wave by which paper sheets 6 and 7, together with interposed coloured papers 8 and 9, for example, carbon paper, are pushed against one of the character forms (types) 10.
  • the coloured paper 8 in front of the original may alternatively be replaced by a coloured tape or cloth.
  • the types 10 are as reliefs arranged on a fastmoving type carrier 11, for example, a type roller as shown in section in FIGURE 1.
  • the device shown in FIGURE 2 is suitable for flying intaglio printing and flying embossing.
  • the essential difference from the device of FIGURE 1 consists in that, for example, a slide spark gap 3 is used for generating the pressure waves and that types 14 are engraved in a roller 13. In this case only one sheet or one foil 12 is present.
  • the types 14 are filled with coloured ink.
  • the gas-pressure waves generated by the electric discharge a print is thus obtained in the manner of intaglio printing.
  • the energy of the discharge is increased and the types 14 exhibit an engraved form suitable therefor it is possible to emboss the fiat material 12 by the same device.
  • By providing the types 14 with printing ink it is then alsopossible t-o blacken the embossed areas of the material 12 obtained by the embossing operation.
  • FIGURE 3 shOWs the principle of a device in which a counter surface is used. It differs from the device of FIGURE 1 only in that a light-weight hammer 15, which serves as the counter surface, is arranged between the discharge space 3 and the paper 4 to 9. The said hammer is held, for example, by thin wire springs 16. In this case the hammer 15 is accelerated by the gas-pressure wave and pushes the paper against the type 10.
  • FIGURE 4 shows the principle of a device having a discharge space which is hermetically closed.
  • the discharge space 3 may be filled with a medium which is advantageous for the discharge.
  • a gas such as, for example, hydrogen is advantageous in known manner if the sparks rapidly succeed one another since the recombination time is then short.
  • This device is particularly advantageous, however, if the discharge space is to be filled with a liquid, for example, water. This is advantageous if it is desired to exert great forces with a small stroke of the hammer.
  • the discharge space 3 is housed in a metallic body 17 closed on one side by a diaphragm 18. Placed on the diaphragm is a thin plate of tungsten 19 which constitutes the hammer and at the same time one electrode.
  • the second electrode 20 passes through an insulator 21 into the discharge space 3.
  • the improvement comprising means defining spaced juxtaposed surfaces, the space between said surfaces not being substantially greater than the thickness of an element to be marked and which is received in said space, said means having a concavity opening into the space between said surfaces, electrode means terminating within said concavity, a
  • hammer and means mounting said hammer within said cavity having a surface bounding the said space whereby discharge of said electrode means generates a shock wave in said concavity which is shaped by said cavity and impinges on said hammer.
  • the improvement comprising means defining juxtaposed first and second surfaces, the space between said surfaces not being substantially greater than the thickness of an element to be marked, said element to be marked being located in said space, a substantially semi-spherical cavity in said first surface which opens into the space between said surfaces, said cavity containing a fluid, electrode means terminating within said cavity in relatively remote spaced relation from the element to be marked, said second surface containing marking means, whereby discharge by said electrode means generates a shock wave in said fiuid in said cavity which is reinforced by said cavity wall and forces said element to be marked against said marking means.
  • Electrode means includes an igniting electrode at the apex of said semi-spherical cavity and said electrode means are positioned away from the wall defining s-aid semi-spherical cavity.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Printing Methods (AREA)
US410665A 1963-11-13 1964-11-12 Pressure wave actuating means for type hammers in high speed printers Expired - Lifetime US3311050A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP0032973 1963-11-13

Publications (1)

Publication Number Publication Date
US3311050A true US3311050A (en) 1967-03-28

Family

ID=7373013

Family Applications (1)

Application Number Title Priority Date Filing Date
US410665A Expired - Lifetime US3311050A (en) 1963-11-13 1964-11-12 Pressure wave actuating means for type hammers in high speed printers

Country Status (6)

Country Link
US (1) US3311050A (de)
BE (1) BE655759A (de)
CH (1) CH432072A (de)
DE (1) DE1251986B (de)
GB (1) GB1089850A (de)
NL (1) NL6413103A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640214A (en) * 1968-06-21 1972-02-08 Precisa Ag Selective printer employing inking spark discharge
US5787803A (en) * 1996-11-08 1998-08-04 Hitachi Koki Co., Ltd. Dot line printer with mimimum hammer gap arrangement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151638A (en) * 1937-07-30 1939-03-21 Gen Electric Recording instrument
US2405714A (en) * 1944-09-27 1946-08-13 United Shoe Machinery Corp Method of and apparatus for perforating sheet material
US2604042A (en) * 1947-10-06 1952-07-22 Ici Ltd Detonating explosive charge and method of impressing surfaces employing same
US2737882A (en) * 1952-05-16 1956-03-13 Burroughs Corp High speed printing and perforating machine
US3015263A (en) * 1961-02-16 1962-01-02 Ibm High speed marking apparatus
US3149562A (en) * 1960-12-02 1964-09-22 Honeywell Regulator Co Pneumatically operable slug module in high speed printers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151638A (en) * 1937-07-30 1939-03-21 Gen Electric Recording instrument
US2405714A (en) * 1944-09-27 1946-08-13 United Shoe Machinery Corp Method of and apparatus for perforating sheet material
US2604042A (en) * 1947-10-06 1952-07-22 Ici Ltd Detonating explosive charge and method of impressing surfaces employing same
US2737882A (en) * 1952-05-16 1956-03-13 Burroughs Corp High speed printing and perforating machine
US3149562A (en) * 1960-12-02 1964-09-22 Honeywell Regulator Co Pneumatically operable slug module in high speed printers
US3015263A (en) * 1961-02-16 1962-01-02 Ibm High speed marking apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640214A (en) * 1968-06-21 1972-02-08 Precisa Ag Selective printer employing inking spark discharge
US5787803A (en) * 1996-11-08 1998-08-04 Hitachi Koki Co., Ltd. Dot line printer with mimimum hammer gap arrangement
CN1081553C (zh) * 1996-11-08 2002-03-27 日立工机株式会社 点线式打印机

Also Published As

Publication number Publication date
BE655759A (de) 1965-05-13
CH432072A (de) 1967-03-15
GB1089850A (en) 1967-11-08
DE1251986B (de) 1967-10-12
NL6413103A (de) 1965-05-14

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