US3103167A - Duplicator and accompanying stencil carrier - Google Patents

Duplicator and accompanying stencil carrier Download PDF

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Publication number
US3103167A
US3103167A US643123A US64312357A US3103167A US 3103167 A US3103167 A US 3103167A US 643123 A US643123 A US 643123A US 64312357 A US64312357 A US 64312357A US 3103167 A US3103167 A US 3103167A
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US
United States
Prior art keywords
bands
stencil
rollers
duplicator
holder
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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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US643123A
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English (en)
Inventor
Zeuthen Karl Gustav
Geertsen Svend Henning
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.)
Zeuthen and Aagaard AS
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Zeuthen and Aagaard AS
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Publication date
Application filed by Zeuthen and Aagaard AS filed Critical Zeuthen and Aagaard AS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L13/00—Stencilling apparatus for office or other commercial use
    • B41L13/04—Stencilling apparatus for office or other commercial use with curved or rotary stencil carriers

Definitions

  • each of the two rollers have, on the ends along the circumference, evenly spaced, protruding, hemispherical studs, over which runs a spring-steel band containing holes corresponding to the studs, so that the band, which during operation lies around the roller, engages with these studs.
  • the steel band serves as stencil carrier, and as a consequence of the hole-stud relationship, is forced to run in synchronisation with the driven duplicator roller, and thereby with the duplicators main axle.
  • the present invention provides a solution of this problem which has set a limit on the practical usable speed for duplicators with two or more duplicator rollers.
  • the solution lies in using as a stencil carrier, at hand composed of flexible, elastic material, such as organic plastic (for example nylon), in which are inlaid extremely thin wires of steel, or other similar inextensi ble, but flexible material, which are twisted together.
  • FIG. 1 is a fragmentary plan View of a stencil carrier as presently used in duplicators
  • FIG. 2 is a fragmentary plan view of the stencil carrier of the present invention.
  • FIG. 3 is a cross-sectional View taken on line 3--3 of FIG. 2;
  • FIG. 4 is a side elevational view of two duplicating rollers with the stencil carrier of this invention entrained thereon;
  • FIG. 5 is a fragmentary side elevational view of the stencil carrier with a stencil holder attached thereto;
  • FIG. 6 is a vertical cross-sectional view taken on line 66 of FIG. 5, and,
  • FIG. 7 is a top plan View of the holder and stencil carrier, as shown in FIG. 5.
  • the stencil carrier 1 shown in FIG. 1 is composed of a thin steel band and has circular holes .2 which pass down over hemispherical studs, for example, projecting out at regular intervals along the circumference of the duplioators rollers. Between these circular holes there are oblong openings 3, which serve to diminish the risk of breakage.
  • the known stencil carrier involves two parallel-running bands lying at a distance from each other corresponding to the width of the stencil. These bands are endless, and run over (two duplicating rollers, one of which is driven synchronised with the main axle of the duplicator, whereas the other, which merely serves as undersupport, is mounted so as to turn freely.
  • the band 4 shown in FIG. 2 is endless and is made of nylon or of a similar flexible and durable material, and has on one side a row of equally spaced ribs 5, one of which is seen in FIG. 3.
  • a completely flexible band is unsuitable as a stencil carrier inasmuch as the necessary synchronisation cannot be maintained by the aid of a band whose length changes during operation.
  • In the hand itself are inlaid Wires composed of thin steel threads twisted together 6, FIG. 3.
  • In the cross-section shown are eight lengthwise-going wires, each composed of four thin strands twisted together into a single wire. Since the band is endless, a single strengthening wire wound up in spiral form with an appropriate number of turns can be used. The number of strands and wires, however, can be varied within wide limits, since the wires do not have to transfer forces of any considerable size, but simply insure that the flexible material of which the band is composed does not stretch and thereby give cause to synchronisation failure.
  • FIG. 4 shows two duplicating rollers 7 and 8, with a stencil carrier 4 as shown in FIG. 2.
  • the part of the rollers or the discs connected to them, over which the appropriate part of the two-band stencil carrier runs, can have indentations for the ribs which are on the bands,
  • the side of the hand opposite to the rib-side can be, but does not have to be, smooth.
  • FIGS. 5, 6 and 7 show in different views a part of a stencil carrier according to the inventional.
  • the stencil carrier is composed appropriately of two endless hands, of which only a part of one is shown and designated by '10.
  • the band has on its underside a row of ribs 11 which act as synchronising elements, in that they seat in the corresponding indentations in the ends of the duplicators rollers.
  • the two endless bands lie at a distance from each other corresponding approximately to the width of a stencil.
  • FIG. '6 Concerning the fastening of a stencil to the stencil carrier, there exists a stencil holder composed of a holder-part .12 having two locking tabs 13 and 14, see namely FIG. '6.
  • the locking tabs 13 and 14 run from the upper side of the band through openings 15 and 16, so that parts of the locking tabs (in which openings 17 and 18, by preference round holes, are found) project through to the underside of the band.
  • Through holes 17 and 18 is led a locking pin 19 containing a pair of notches 20 and 21, which set against the locking tabs 13- and 14 and serve to prevent locking pin 19 from being inadvertently displaced axially when first brought into position.
  • a stencil carrier comprising a pair of endless lbands entrained over the rollers and composed of flexible material inlaid with twisted (threads of flexible, inextensible material, said [bands being spaced 4 apart a distance approximately equal to the width of a stencil, said bands having ribs provided on their inner faces for engaging the rollers whereby the bands are positively entrained on the rollers to insure synchronization between the driving roller and the stencil, a stencil holder carried by the bands, said bands having transversely aligned and spaced apart openings formed therein, said holder having tabs extending through the openings to the inner fialces of the bands, said tabs having holes aligned transversely of the bands and a locking element fitted in the holes to lock the holder on the outer faces of the bands.

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US643123A 1956-03-05 1957-02-28 Duplicator and accompanying stencil carrier Expired - Lifetime US3103167A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB350974X 1956-03-05

Publications (1)

Publication Number Publication Date
US3103167A true US3103167A (en) 1963-09-10

Family

ID=10373781

Family Applications (1)

Application Number Title Priority Date Filing Date
US643123A Expired - Lifetime US3103167A (en) 1956-03-05 1957-02-28 Duplicator and accompanying stencil carrier

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US (1) US3103167A (de)
CH (1) CH350974A (de)
FR (1) FR1168860A (de)
GB (1) GB793738A (de)
NL (1) NL94251C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847076A (en) * 1973-01-04 1974-11-12 M Vasilantone Printing apparatus

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US798572A (en) * 1904-11-12 1905-08-29 Eugene Van Wagenen Stamp and stamp-canceling device.
US1205315A (en) * 1911-12-30 1916-11-21 Tagograph Company Printing-press.
US1494581A (en) * 1920-07-10 1924-05-20 Breuer Armin Duplicating apparatus
US2011092A (en) * 1932-12-14 1935-08-13 Todd Co Inc Type bar and holder therefor
US2019375A (en) * 1933-12-23 1935-10-29 Wheelwright John Sylvester Stencil printing machine
US2106306A (en) * 1937-04-13 1938-01-25 Markem Machine Co Type wheel
US2762297A (en) * 1952-07-30 1956-09-11 Rca Corp High speed recorder

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US798572A (en) * 1904-11-12 1905-08-29 Eugene Van Wagenen Stamp and stamp-canceling device.
US1205315A (en) * 1911-12-30 1916-11-21 Tagograph Company Printing-press.
US1494581A (en) * 1920-07-10 1924-05-20 Breuer Armin Duplicating apparatus
US2011092A (en) * 1932-12-14 1935-08-13 Todd Co Inc Type bar and holder therefor
US2019375A (en) * 1933-12-23 1935-10-29 Wheelwright John Sylvester Stencil printing machine
US2106306A (en) * 1937-04-13 1938-01-25 Markem Machine Co Type wheel
US2762297A (en) * 1952-07-30 1956-09-11 Rca Corp High speed recorder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847076A (en) * 1973-01-04 1974-11-12 M Vasilantone Printing apparatus

Also Published As

Publication number Publication date
CH350974A (de) 1960-12-31
NL94251C (de)
GB793738A (en) 1958-04-23
FR1168860A (fr) 1958-12-18

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