US3838765A - Printing device with moveable characters - Google Patents

Printing device with moveable characters Download PDF

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Publication number
US3838765A
US3838765A US00316171A US31617172A US3838765A US 3838765 A US3838765 A US 3838765A US 00316171 A US00316171 A US 00316171A US 31617172 A US31617172 A US 31617172A US 3838765 A US3838765 A US 3838765A
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United States
Prior art keywords
groove
shoe
type
base
carrier
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Expired - Lifetime
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US00316171A
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English (en)
Inventor
J Deproux
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Bull SA
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Societe Industrielle Honeywell Bull
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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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/36—Selecting arrangements applied to type-carriers rotating during impression
    • B41J7/46—Rolling contact during impression
    • 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

Definitions

  • a printing device including a type carrier and a writing medium, the type carrier being actuated so as to advance with respect to the writing medium, and a striking arrangement for applying mechanical strike pulses by means of hammers to the print medium.
  • the device is characterized in that the type carrier is made of an element, at least partially coated with a material with great damping ability which supports an assembly of shoes, each of said shoes carries at least one type character and is introduced into said material so as to be able to move in its housing when a mechanical strike pulse is applied to the type supported in the shoes.
  • the invention is applicable to linear type carrier printers or to drum, wheel or disc printers.
  • Printers with a linear-type carrier or with a drum comprise a writing medium in front of a moving type carrier and a printing set including printing motors.
  • everyone of these motors is capable of sequentially applying strike pulses to the characters by means of a striking hammer.
  • the linear-type carrier printers in which the carrier is an endless belt pose'still other problems because of their special structure.
  • the endless belt is usually equipped with elastic type-carrying tongues on one rim so that the characters are positioned at the very ends of these tongues.
  • the type-carrying tongue is deformed so as to permit a struck character to remain in front of the corresponding printing position as long as the impact of the hammer lasts.
  • the tongues become subjected to marked stresses and the frequent repetition of these stresses entails the risk of a reduction of the working life of the tongues.
  • the printing device includes a type carrier and a writing medium, wherein the type carrier moves past the writing medium. Furthermore, a printing set applys strike pulses to the print medium by means of hammers, so that the writing medium is thereby placed in contact with the type carrier when the pulses are applied.
  • the type carrier consists of an element which is at least partially coated with a material with great damping ability.
  • the type carrier contains a set of shoes each of which holds at least one type character and is enclosed in said material. The type character is capable of moving in its enclosure when a strike pulse is applied to it.
  • the material is preferably a substance such as a visco-elastic elastomer.
  • the type carrier is an endless belt mounted on two pullies.
  • the type carrier is a cylindrical drum. It is preferable that the shoes be individually insertable into said material which is in turn cemented onto the carrier element.
  • FIG. 1 is a perspective view of the type carrier according to the invention.
  • FIG. 2a is an enlarged vertical sectional view through a portion of the type carrier of FIG. 1 along the line A,A' of FIG. 2b and shows the type carrier in more detail.
  • FIG. 2b is an enlarged elevational view of a portion of the type carrier.
  • FIG. 2c is an enlarged plan view of a portion of the type carrier in position relative to a writing medium and impacting means.
  • FIGS. 3 and 4 are perspective views of a typecarrying shoe and the shock-absorbers between which it is positioned.
  • FIG. 5 illustrates the ease with which characters may be interchanged.
  • FIGS. 6a, 6b, 6c and 6d are schematic plan views showing the different phases of operation of a printing device with a type carrier such as shown in FIG. 1.
  • FIG. 7 demonstrates an alternative embodiment of the type carrier device according to the invention.
  • FIG. 1 is a perspective view exemplifying a type carrier which may be used with the invention.
  • the carrier is an endless belt (1) on two pullies (not shown) within the printer.
  • the pullies are symbolized by their vertical rotational axes Y,, Y and Y Y
  • Y, Y and Y Y To facilitate an understanding of this illustration, only one part (2) of the belt is shown with its characters intentionally oversized in relation to it so as to make them more distinct. This part (2) is illustrated on an even higher scale in FIGS. 2a and 2b.
  • the part (2) includes as illustrated in FIGS. 1, 2a and 2b, type-holding shoes (4) to (7) and corresponding characters (8) to (11), visco-elastic shock-absorbers (12) to (17) and synchronization apertures (18) to (22) as well as a metallic core (23) of the type-carrier (1).
  • the type-carrying shoe 5 and its character (9) are shown in perspective in FIG. 3. It is to be appreciated that all other character-holding shoes are identical. For reasons of convenience, only a single character is shown in the shoes of FIGS. 2b and 3. It is obvious, though, that the invention is by no means limited to shoes carrying a single character, and that it: is equally applicable to shoes holding several types, positioned, i.e., one above the other.
  • the shoe (3) is placed between the shock-absorbers 12) and (13) and within the location (30) (which is shown in FIG. 2b).
  • Each shoe (3) to (7) is positioned between two visco-elastic dampers.
  • the shoe (4) is enclosed between the shock-absorbers (l3) and (14).
  • the shock-absorber (14) is termed the downstream damper for shoe (4) and the shock-absorber (13) is called the upstream damper.
  • the shock-absorber (14) is the upstream damper and the shock-absorber (15) is the downstream damper.
  • visco-elastic shockabsorbers may for example be made of an elastomer material which is cemented to the metallic core (23). Then the flutings (3A), (4A), (5A) are cut into the body of the material. It goes without saying that the invention is not restricted to shock-absorbers built into an elastomer material. The invention is directed to any damper constructed of any material of a low energyrestoring power.
  • the shock-absorbers (12) to (17) are deemed independent units from a functional point of view. This is justified by their behavior in practice.
  • FIGS. 20 the shoes (5), (6), (7), and the corresponding characters (9), (10), (11), as well as three striking hammers (24), (25 (26), the writing medium (27) and the ink ribbon (28) are shown.
  • the three striking hammers can be inclined in relation to the writing medium (27), as described in the French Pat. application No. 7 l/42,937 filed on Nov. 30, 1971 for a Printer with an Inclined Printing Module.
  • the invention is obviously not limited to such an arrangement of hammers and is equally useful for hammers positioned perpendicularly to the direction of the passing characters.
  • the lubricant enables each shoe to oscillate with greater ease between the downstream and the upstream shock-absorber when the character corresponding with this shoe is struck by one of the hammers.
  • the lubricant furthermore, facilitates the entering of the typecarrying shoes between the shock-absorbers.
  • the various phases of this insertion are illustrated in FIG. 5. The shoe (5) is not inserted, the shoe (7) has fully entered, the shoe (6) takes on an intermediate position.
  • a pair of pincers (29) are shown partly in dashed lines which is all that is necessary to insert the socket (6) between the shockabsorber (15) and (16) by exertion of a simple pressure so that the expansion of the shoe in its end part (top of the illustration) accomplishes a sufficient locking. It goes withiout saying that the same holds for each typecarrying shoe. It may be seen then that exchanging one type-holding shoe with another is easy. It is feasible to insert shoes from the top also, provided that shoes and shock-absorbers are given a different shape.
  • FIG. 6 The operation of the printing device according to the invention is illustrated in FIG. 6.
  • Shoe (6) and its downstream shockabsorber (l6) and its upstream shockabsorber 15) is taken as an example. It is assumed that the hammer (25), for instance, is set in motion by its printing motor and that it supplies a striking pulse Jo.
  • the print of the character (11) may be divided into four phases which are: begin middle end of print and finally return of the shoe (6) and its character (10) to their initial position. These four phases are illustrated respectively in the FIG. 6a, 6b, 6c, 6d and are described hereinafter.
  • This phase corresponds with the initial contact of the character 10 with the ribbon. It is assumed that this is the instant in which contact begins.
  • a reference mark A is to be assumed attached to the metallic core (23) of the type carrier (1) and it is also assumed that this reference mark faces a fixed reference mark 0.
  • V the velocity of the carrier movement
  • the shoe (6) is in complete contact with its downstream shockabsorber (16) and touches tangentially the metallic core (23) of the belt (1) at the point 8,. Because of the effect of the striking pulse .1 from the hammer, a force F is experienced at point D the contact point of the character l0) and the ribbon (28). This force is relatively weak.
  • the type-carrier has advanced a distance equal to e/2 in relation to the reference mark 0 wherein e V xt in which r is the total contact time of the character with the ribbon during the impression. It is assumed that S is the tangent point of the shoe with the core (23) coinciding with A during this phase. M is the contact point of the ribbon (28) with the character (11). The impact force F is applied at this point and is at a maximum. It is to be noted however, that the lever arm is reduced which tends to limit the increase of the torque. This torque always has the tendency of pulling the shoe (6) toward the upstream shockabsorber (15) in the direction of the arrow Fl.
  • This phase corresponds with the contact end between character (10) and ribbon (28).
  • the reference mark A of the carrier (1) has advanced by a quantity 5 corresponding with the total contact time to. It is assumed that S is the tangent point between the shoe (6) and the core (23) and F the contact point between the character (I) and the ribbon (28). The impact force F is then weak. However, the upstream shockabsorber has been sharply squeezed and the braking is extremely forceful. These two conditions, carried out simultaneously, bring about the return of the shoe (6) to its downstream shock absorber and facilitates its rapid return to its initial position. Point F leaves a trace F on the ribbon. The shape of the upstream shockabsorber is so calculated that the braking of the shoe is as efficient as possible.
  • the reference mark A of the carrier (I) has advanced by a quality E Voxt in which t,. is called restoration time of the type-carrying shoe.
  • the shoe is only subjected to the stresses of the shockabsorbers.
  • the upstream damper (I5) it reaches the downstream shockabsorber (I6) with a highly reduced energy, yet sufficient to compress the latter.
  • the shoe becomes stabilized in its initial position (the one of phase I).
  • the position of the shoe (6) is denoted in dashed lines when it compresses the downstream shockabsorber (I6).
  • the shape of the downstream damper is so calculated that the shock-absorption of the shoe (6) occurs in the shortest time.
  • the shock-absorbers (I5) and (I6) are relatively little affected and compressed by the shoe (6). Risks of a disturbance of neighboring type-carrying shoes, and hence flutter, is practically non existant.
  • the shock-absorber is strongly compressed and there is a risk of disturbing the adjoining type-carrying shoe. It is for this reason that the form and the nature of the shock-absorbers are subjected to a special examination so that the risks of flutter in the third phase is avoided.
  • FIG. 7 A drum printer according to the invention is partially shown in FIG. 7.
  • This illustration is a side view of the section of the type-carrier (I00), of the ink ribbon (I28), of the writing support (127) and of one hammer (I) (in a side view only a single hammer is shown). These parts all lie in a vertical plane.
  • the carrier is a hollow cylindrical drum revolving with a uniform speed V around a horizontal axle which is perpendicular to the plane of the illustration and passing through point 0.
  • the typecarrying shoes (I05), (I06), (1107), the visco-elastic shock-absorbers (IM) to (II7), the metallic core (I23) of the drum (I00) are enlarged in relation to the real dimensions of the drum.
  • the shoes (I05) to (I07) have a form similar to that of the shoes (I) to (7) shown in FIGS. 2 and 3. Each shoe is enclosed between two visco-elastic shockabsorbers.
  • the shoe (I05) for example, is enclosed between the shock-absorbers (1M) and
  • the damper (I14) is the upstream shock-absorber
  • the damper (I15) is the downstream shock-absorber.
  • the damper (II5) is the upstream" shock-absorber
  • damper (M6) is the downstream" shock-absorber.
  • the invention is in no way limited to the two printing devices described above, but that it may also be applied to any linear-type carrier such as chains with pushed blocks, typecarrying chains, type-carrying belts called time belt. It is moreover, applicable to carriers of the rotating type, such as type-carrying wheels or disks.
  • Printing device comprising a type carrier and a write medium, means supporting the type carrier for passing motion relative to the writing medium, a strike assembly for applying striking pulses to the writing medium by means of hammers, means mounting the write medium to be placed in contact with the type carrier when the striking pulses are applied thereto by said srike assembly, characterized in that the type carrier comprises a base having thereon a material coating which includes at least partially a substance with a weak energy-restoration power, said material coating holding a set of shoes of which each bears at least one type character, and each shoe being in a groove in said substance and being partially enclosed in said substance in a manner so as to be capable of tilting within the substance relative to said base when a striking pulse is applied by a hammer to the character which it carries, each groove and respective shoe having opposing contacting surfaces for limiting tilting of said shoe within its respective groove and the relationship between contacting surfaces of each groove and a respective shoe is one wherein each type face is tilted at a preselected small angle to said
  • the printing device according to claim 1 characterized by the base being an endless metallic belt mounted on two pulleys.
  • the printing device according to claim 1 characterized by the base being a rigid cylindrical drum.
  • a printer apparatus for impact printing characters onto a print medium wherein a movable carrier of type characters moves its type characters past a print medium in a predetermined direction and an impacting apparatus selectively impacts said print medium with the moving characters, said movable carrier of type characters comprising:
  • each groove having a throat and an open mouth and comprising a pair of rounded shoulders at the mouth of said groove, said rounded shoulders terminating at the throat of said groove which defines the narrowest width of said groove, said groove furthermore comprising a cavity upwardly of said throat, said cavity having a width substantially larger than said throat;
  • each shoe containing at least one type character thereon, each of said shoes having an end releaseably received in said cavity and which end is substantially wider than the throat of the groove,
  • each shoe being releaseably retained in a respective groove within said layer of material by the interlocking of the shoe end in its respective cavity for limited rocking movement transversely of said groove relative to said base in response to engagement of the type carrier with print medium during movement of said carrier, and said stem and said groove defining contactable surfaces for effecting said limiting of rocking of the respective shoe, and the bottom of each cavity comprises at least a portion of said base and said end of each shoe has a rounded bottom which contacts the portion of said base so as to define a pivotal point for said shoe.
  • each groove is spaced apart from adjacent grooves so that the rounded shoulders of adjacent grooves form a rounded surface of substantially the same curvature, said rounded shoulders acting independent of each other with respect to absorbing movement of their respective shoes.
  • the printing device according to claim 7 characterized by the base being an endless metallic belt mounted on two pulleys.
  • the printing device according to claim 7 characterized by the base being a rigid cylindrical drum.
  • a printer apparatus for impact printing characters onto a print medium wherein a movable carrier of type characters moves its type characters past a print medium in a predetermined direction and an impacting apparatus selectively impacts said print medium with the moving characters, said movable carrier of type characters comprising:
  • each groove having a throat and an open mouth and comprising a pair of rounded shoulders at the mouth of said groove, said rounded shoulders terminating at the throat of said groove which defines the narrowest width of said groove, said groove furthermore comprising a cavity upwardly of said throat, said cavity having a width substantially larger than said throat;
  • each shoe containing at least one type character thereon, each of said shoes having an end releaseably received in said cavity and which end is substantially wider than the throat of the groove,
  • each shoe being releaseably retained in a respective groove within said layer of material by the interlocking of the shoe end in its respective cavity for limited rocking movement transversely of said groove relative to said base in response to engagement of the type carrier with print medium during movement of said carrier, and said stem and said groove defining contactable surfaces for effecting said limiting of rocking of the respective shoe, and the relationship between contacting surf-ces of each groove and a respective shoe is one wherein each type face is tilted at a preselected small angle to said base.
  • each groove is spaced apart from adjacent grooves so that the rounded shoulders of adjacent grooves form a rounded surface of substantially the same curvature, said rounded shoulders acting independently of each other with respect to absorbing movement of their respective shoes.
  • each cavity comprises at least a portion of said base and said end of each shoe has a rounded bottom which contacts the portion of said base so as to define a pivotal point for said shoe.

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US00316171A 1971-12-28 1972-12-18 Printing device with moveable characters Expired - Lifetime US3838765A (en)

Applications Claiming Priority (1)

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FR7147026A FR2166511A5 (de) 1971-12-28 1971-12-28

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US3838765A true US3838765A (en) 1974-10-01

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DE (1) DE2263866A1 (de)
FR (1) FR2166511A5 (de)
GB (1) GB1387148A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015699A (en) * 1974-04-08 1977-04-05 Burroughs Corporation Alphanumeric serial printer with a flexible membrane printing element
WO1985000320A1 (en) * 1983-07-05 1985-01-31 Burroughs Corporation Serial print wheel impact printer
US4828410A (en) * 1983-07-05 1989-05-09 The Standard Register Company Serial print wheel impact printer

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US453699A (en) * 1891-06-09 Type belt
DE904292C (de) * 1940-09-28 1954-02-18 Elsa Margarete Kramer Typenhalter und Typentraeger aus Gummi fuer zusammensetzbare Druckstempel od. dgl.
US2762297A (en) * 1952-07-30 1956-09-11 Rca Corp High speed recorder
US2987991A (en) * 1956-02-02 1961-06-13 Sunkist Growers Inc Printing machine
US3186337A (en) * 1962-01-02 1965-06-01 Marsh Stencil Machine Company Tape coding attachment
US3209682A (en) * 1962-08-30 1965-10-05 Ibm Type carrier for high speed printer
US3230880A (en) * 1962-09-20 1966-01-25 Millard B Beaver Type having flexible base of varying thickness to form hinge means
US3465673A (en) * 1966-06-08 1969-09-09 Kenner Products Co Hand painting toy with snap-in print wheel
US3640369A (en) * 1969-04-07 1972-02-08 Singer Co Flexible shell printing element
US3667384A (en) * 1970-10-01 1972-06-06 Burroughs Corp Slotted print type belt with angularly disposed type mounting strips
US3683802A (en) * 1970-02-04 1972-08-15 Burroughs Corp Endless type carrier belt having type-receiving pockets in an edge thereof
US3717234A (en) * 1969-10-14 1973-02-20 Siemens Ag Carrier for type carriers for high speed printing device

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US453699A (en) * 1891-06-09 Type belt
DE904292C (de) * 1940-09-28 1954-02-18 Elsa Margarete Kramer Typenhalter und Typentraeger aus Gummi fuer zusammensetzbare Druckstempel od. dgl.
US2762297A (en) * 1952-07-30 1956-09-11 Rca Corp High speed recorder
US2987991A (en) * 1956-02-02 1961-06-13 Sunkist Growers Inc Printing machine
US3186337A (en) * 1962-01-02 1965-06-01 Marsh Stencil Machine Company Tape coding attachment
US3209682A (en) * 1962-08-30 1965-10-05 Ibm Type carrier for high speed printer
US3230880A (en) * 1962-09-20 1966-01-25 Millard B Beaver Type having flexible base of varying thickness to form hinge means
US3465673A (en) * 1966-06-08 1969-09-09 Kenner Products Co Hand painting toy with snap-in print wheel
US3640369A (en) * 1969-04-07 1972-02-08 Singer Co Flexible shell printing element
US3717234A (en) * 1969-10-14 1973-02-20 Siemens Ag Carrier for type carriers for high speed printing device
US3683802A (en) * 1970-02-04 1972-08-15 Burroughs Corp Endless type carrier belt having type-receiving pockets in an edge thereof
US3667384A (en) * 1970-10-01 1972-06-06 Burroughs Corp Slotted print type belt with angularly disposed type mounting strips

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015699A (en) * 1974-04-08 1977-04-05 Burroughs Corporation Alphanumeric serial printer with a flexible membrane printing element
WO1985000320A1 (en) * 1983-07-05 1985-01-31 Burroughs Corporation Serial print wheel impact printer
US4828410A (en) * 1983-07-05 1989-05-09 The Standard Register Company Serial print wheel impact printer

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Publication number Publication date
GB1387148A (en) 1975-03-12
FR2166511A5 (de) 1973-08-17
DE2263866A1 (de) 1973-07-05

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