US3348288A - Drum clamp - Google Patents

Drum clamp Download PDF

Info

Publication number
US3348288A
US3348288A US492223A US49222365A US3348288A US 3348288 A US3348288 A US 3348288A US 492223 A US492223 A US 492223A US 49222365 A US49222365 A US 49222365A US 3348288 A US3348288 A US 3348288A
Authority
US
United States
Prior art keywords
drum
slot
sheet
bar
clamp
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
US492223A
Inventor
Armand R Tanguay
George T Shimabukuro
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Priority to US492223A priority Critical patent/US3348288A/en
Priority to GB43085/66A priority patent/GB1123459A/en
Application granted granted Critical
Publication of US3348288A publication Critical patent/US3348288A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/06—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
    • H04N1/08—Mechanisms for mounting or holding the sheet around the drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means
    • 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
    • B41L11/00—Apparatus for directly duplicating from hectographic masters in mirror image, i.e. "wet duplicators" for producing positive copies
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/62—Holders for the original
    • G03B27/6207—Holders for the original in copying cameras
    • G03B27/625—Apparatus which relate to the handling of originals, e.g. presence detectors, inverters
    • G03B27/6257—Arrangements for moving an original once or repeatedly to or through an exposure station
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
    • G03G15/6558—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/06—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
    • H04N1/08—Mechanisms for mounting or holding the sheet around the drum
    • H04N1/0804—Holding methods
    • H04N1/0813—Holding sides of the sheet which are substantially parallel to the drum axis
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/06—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
    • H04N1/08—Mechanisms for mounting or holding the sheet around the drum
    • H04N1/083—Holding means
    • H04N1/0839—Mechanical clamps, i.e. means for holding the sheet against the drum by mechanical force
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00409—Transfer device

Definitions

  • ABSTRACT OF THE DISCLOSURE Apparatus for securing a sheet of flexible material to a drum including a clamp bar supported Within the drum actuatable -by means of an axially movable cam for securingfa'leadingV edge of sheet material and a wiper bar supported externally of the drum to provide a tension on the sheet as it is wrapped thereabout and to secure the trailing edge.
  • This application relates to improved means for clamping a sheet of flexible material to a drum.
  • FIG. 1 is an isometric view of a drum ready to receive a sheet of material
  • FIG. 2 is an isometric view of a drum holding one edge of the sheet of material
  • FIG. 3 is an isometric view of the drum around which a sheet of material is being wrapped
  • FIG. 4 is an isometric view of the drum with a sheet of material clamped therearound;
  • FIG. 5 is a cross-sectional view of the apparatus of FIGS. 1 through 4.
  • FIG. 6 is a longitudinal section through the apparatus of FIGS. l through 4.
  • FIG. 1 there is shown a drum 10, prefer-- ably but not necessarily circular in section, which is mounted on a shaft 11 which in turn is journaled in bearings 12 for rotation with respect to a frame 13. It would be equally possible to employ a fixed shaft and journal the drum for rotation about the shaft.
  • a drive mot-or 14 rotates drum through gears 15 at a speed appropriate for the intended use of the drum, i.e., a duplicating machine drum, facsimile recorder drum, or the like.
  • a second clock type motor 16 usable only when applying a sheet to the drum for clamping is mounted so as to drive the drum 10 at a very low speed on the order of a few ICC revolutions per minute.
  • Motor 16 will normally include an internal clutch as is commercially available in motors of this type.
  • a clamp bar 17 is mounted in a slot 18, these elements being more clearly shown in FIGS. 5 and 6. At least one edge of this slot is preferably inclined from a radius and bar 17 includes a corresponding lip and is shaped to conform to slot 18.
  • a button 19 projecting axially from the visible end of drum 10
  • clamp ⁇ bar 17 may be raised above the surface of dr-um 10 to the position sho-wn.
  • a further button 28 not visible in this figure, is on the opposite end of drum 10, and may be depressed to retract clamp bar 17 into slot 18 so that it lies approximately flush with the surface of drum 10.
  • one edge of the material 25 is inserted under and against clamp bar 17 which is then lowered, wedging the paper firmly between clamp bar 17 and one side of slot 1S.
  • FIG. 2 shows a sheet of material 25 clamped in this manner.
  • Drum 10 also includes a wiper bar 20 and a corresponding slot 21, positioned near slot 18.
  • Wiper bar 20 is held at each end by spring means 22 which are attached to bearings 23 lfor rotation about shaft 11.
  • Wiper bar 20 is shown in slot 21 in FIG. l, while in FIG- 2 wiper bar 20 has been lifted out of slot 21.
  • FIG. 3 illustrates what happens as drum 10 is rotated away from the viewer either manually or preferably by motor 16. Stops 24 mounted on frame 13 prevent wiper bar 20 from rotating with drum 10 when the bar is out of slot 21 as shown in FIG. 3. Bar 20 is then held against the surface of drum 10 by spring means 22 and as drum 10 slowly turns under wiper bar 20, the sheet of material 25 is drawn firmly under a windup tension against the surface of drum 10 by the smoot-h underside of the bar.
  • FIG. 4 shows the completion of this process.
  • the length of sheet 25 is not extremely critical. The sheet must be long enough for one end to lie under bar 20, but the size of slot 21 will accommodate a certain excess length. A further excess will extend outside slot 21 and may be manually trimmed olf.
  • FIG. 5 is a cross-sectional view of drum 10 more clearly illustrating the configuration of the clamp bars and corresponding slots. In particular, it can ibe seen that clamp bar 20 is smoothly contoured on its lower surface.
  • FIG. 6 is a longitudinal sectional view through the apparatus shown in the preceding figures. It can be seen that button 19 is actually one end of the clamp bar operating shaft 31 which has three ramps 32 formed thereon. These ramps cooperate with corresponding ramps 33 on yclamp bar 17 to raise the bar out of dru'm 10. Wire springs 30 are provided to draw clamp bar 17 back into drum 10. It will be understood that either or both of motors 14 and 16 may be replaced by hand cranks or the like and that various equivalent structures can be provided for those shown in the figures without departing from the concept of the invention. Furthermore, the in- E 4 vention can be satisfactorily employed without stops 24.
  • Sheet to drum clamping means comprising: clamped thereon. (a) a drum journaled for rotation about an axis in a 3. Apparatus according to claim 1 including stop frame; 5 means lmounted With respect to said frarne to prevent (b) a first longitudinal slot in the drum; said Wiper bar from rotating with said drum when out of (c) a clamp bar supported within said drum normally said second slot and to -permit it to rotate with said drum biased to lie Within said first slot and having a when lying in said second slot.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Handling Of Cut Paper (AREA)

Description

@- 24 E967 A. R. TANGUAY ETAI. 3,348,288
DRUM CLAMP Filed Oct. l, 1965 5 Sheecs-ShesecI 1 INVENTORS ARMAND RTANGUAY G RTSHJMAB KURO @CL 24 w7 A. R. TANGUAY ETAI. 3,348,288
DRUM CLAMP Filed Oct. l, 1965 5 Sheets-Sheet 2 INVENTORS ARMAND R. TANGUAY QEORGE T SHIMUKURO BT? m1 l E f Q ATTORNEYS @at 24, i967 A. R. TANGUAY ETAL 3,348,288
DRUM CLAMP 5 Sheets-Sheet 3 Filed OCT.. l, 1965 sm U R om TA mr. WD D N ME AR A BEAEORG 'if SH IMABUKURO ATTRNEVS @Ch 24 l957 A. R. TANGUAY ETAL 3,348,283
DRUM CLAMP Filed Oct. 1, 1965 5 Sheets-Sheet 4 INVENTORS ARMAND R.TANGUAY 'i'. SHIMABUKURO wir ATTORNEYS Y L A T E Y A U G N A T R A.
DRUM CLAMP 5 Sheets-Sheet 5 Filed Oct. l, 1965 AR S U @Gm TNU E Nm N P` WRA., 0 N IDH A NS MT. R
Unted States Patent() DRUM CLAMP Armand' R. Tanguay, Pasadena, and George T. Shimabukuro, Monterey Park, Calif., assignors to Xerox Corporation, Rochester, N.Y., a corporation of New York Filed Det. 1, 1965, Ser. No. 492,223 3 Claims. (Cl. 29-118) ABSTRACT OF THE DISCLOSURE Apparatus for securing a sheet of flexible material to a drum including a clamp bar supported Within the drum actuatable -by means of an axially movable cam for securingfa'leadingV edge of sheet material and a wiper bar supported externally of the drum to provide a tension on the sheet as it is wrapped thereabout and to secure the trailing edge.
This application relates to improved means for clamping a sheet of flexible material to a drum.
There are many arts in which it is desired to firmly apply and easily remove a sheet of paper, plastic, thin metal or other reasonably flexible material to a drum, particularly a rotatable drum. These lields include facsimile recording, seismographic recording, spirit duplicating, lithographie printing and many others.
It is accordingly an object of the invention to provide improved means for clamping a sheet of flexible material to a drum.
It is a further object to provide an improved means for clamping a sheet of flexible material to a drum in which the material need not be prepunched or otherwise specially prepared.
It is still a further object of the invention to provide means for clamping a sheet of flexible material to a drum in which the length of the sheet of the material is not critical.
It is still a further object of the invention to provide means for clamping a sheet of flexible material to a drum which is operable -by untrained clerical personnel and which holds the sheet firmly to the surface of the drum.
The invention and its objects will be more fully explained with reference to the drawings.
FIG. 1 is an isometric view of a drum ready to receive a sheet of material;
FIG. 2 is an isometric view of a drum holding one edge of the sheet of material;
FIG. 3 is an isometric view of the drum around which a sheet of material is being wrapped;
FIG. 4 is an isometric view of the drum with a sheet of material clamped therearound;
FIG. 5 is a cross-sectional view of the apparatus of FIGS. 1 through 4; and
FIG. 6 is a longitudinal section through the apparatus of FIGS. l through 4.
Referring to FIG. 1 there is shown a drum 10, prefer-- ably but not necessarily circular in section, which is mounted on a shaft 11 which in turn is journaled in bearings 12 for rotation with respect to a frame 13. It would be equally possible to employ a fixed shaft and journal the drum for rotation about the shaft. A drive mot-or 14 rotates drum through gears 15 at a speed appropriate for the intended use of the drum, i.e., a duplicating machine drum, facsimile recorder drum, or the like. A second clock type motor 16 usable only when applying a sheet to the drum for clamping is mounted so as to drive the drum 10 at a very low speed on the order of a few ICC revolutions per minute. Motor 16 will normally include an internal clutch as is commercially available in motors of this type. A clamp bar 17 is mounted in a slot 18, these elements being more clearly shown in FIGS. 5 and 6. At least one edge of this slot is preferably inclined from a radius and bar 17 includes a corresponding lip and is shaped to conform to slot 18. By depressing a button 19 projecting axially from the visible end of drum 10, clamp `bar 17 may be raised above the surface of dr-um 10 to the position sho-wn. A further button 28 not visible in this figure, is on the opposite end of drum 10, and may be depressed to retract clamp bar 17 into slot 18 so that it lies approximately flush with the surface of drum 10.
As a first step in loading a sheet of flexible material onto the drum, one edge of the material 25 is inserted under and against clamp bar 17 which is then lowered, wedging the paper firmly between clamp bar 17 and one side of slot 1S.
FIG. 2, shows a sheet of material 25 clamped in this manner.
Drum 10 also includes a wiper bar 20 and a corresponding slot 21, positioned near slot 18. Wiper bar 20 is held at each end by spring means 22 which are attached to bearings 23 lfor rotation about shaft 11. Wiper bar 20 is shown in slot 21 in FIG. l, while in FIG- 2 wiper bar 20 has been lifted out of slot 21.
FIG. 3 illustrates what happens as drum 10 is rotated away from the viewer either manually or preferably by motor 16. Stops 24 mounted on frame 13 prevent wiper bar 20 from rotating with drum 10 when the bar is out of slot 21 as shown in FIG. 3. Bar 20 is then held against the surface of drum 10 by spring means 22 and as drum 10 slowly turns under wiper bar 20, the sheet of material 25 is drawn firmly under a windup tension against the surface of drum 10 by the smoot-h underside of the bar.
FIG. 4 shows the completion of this process. When slot 21 has rotated 'beneath clamp bar 20, the bar will be drawn into the slot, clamping thereunder the end of the sheet of material 25 opposite to that which is clamped under clamp bar 17.
As clamp bar 20 falls into slot 21, it is no longer prevented from rotating by stops 24 and the drum 10 is now entirely ready for its normal operati-on, in whic-h both clamp -bars rotate together with the drum as it is driven by motor 14. It is apparent that no hand operations are required once sheet 25 has been clamped beneath clamp bar 17. To remove sheet 25, it is only necessary to raise clamp bar 17, remove the edge of the sheet held thereunder, lift clamp bar 20 out of its slot and rest it on an uncovered portion of drum 10.
The length of sheet 25 is not extremely critical. The sheet must be long enough for one end to lie under bar 20, but the size of slot 21 will accommodate a certain excess length. A further excess will extend outside slot 21 and may be manually trimmed olf.
FIG. 5 is a cross-sectional view of drum 10 more clearly illustrating the configuration of the clamp bars and corresponding slots. In particular, it can ibe seen that clamp bar 20 is smoothly contoured on its lower surface.
FIG. 6 is a longitudinal sectional view through the apparatus shown in the preceding figures. It can be seen that button 19 is actually one end of the clamp bar operating shaft 31 which has three ramps 32 formed thereon. These ramps cooperate with corresponding ramps 33 on yclamp bar 17 to raise the bar out of dru'm 10. Wire springs 30 are provided to draw clamp bar 17 back into drum 10. It will be understood that either or both of motors 14 and 16 may be replaced by hand cranks or the like and that various equivalent structures can be provided for those shown in the figures without departing from the concept of the invention. Furthermore, the in- E 4 vention can be satisfactorily employed without stops 24. tive to rotate said drum at a rst rate to wrap a sheet What is claimed is: thereon and at a second rate for utilization of the sheet 1. Sheet to drum clamping means comprising: clamped thereon. (a) a drum journaled for rotation about an axis in a 3. Apparatus according to claim 1 including stop frame; 5 means lmounted With respect to said frarne to prevent (b) a first longitudinal slot in the drum; said Wiper bar from rotating with said drum when out of (c) a clamp bar supported within said drum normally said second slot and to -permit it to rotate with said drum biased to lie Within said first slot and having a when lying in said second slot. plurality of ramp portions thereon; (d) an axially extending cam supported for movement 10 References Clted Within said drum and having ramp portions opera- UNITED STATES PATENTS tively connected to said clamp bar ramp portions 2,049,917 8/1936 Mamma. to move sa1d bar outward from sa1d slot tovrecelve 2 051 511 8/1936 Fich 29 1 L5 first ed e of a sheet of flexible material and to a .dg b 2,513,409 7/1950 Grafstem et a1. 29-118 XR :rnr-fsi/eea toasraiicrliglrldninto `sa1d slot to secure sa1d 15 2,514,974 7 /1950 Schauen (e) a secgond longitudinal slot in the surface of said 2622000 12/1952 Thompson 29-118 XR 2,768,579 10/1956 Pies V 29-118 XR drum adjacent t0 sa1d rst slot; and 0 (f) a Wi b r no u b. d t 1. .,m. .d 2,979,372 4/1/61 Digney.
Per a rma Y me 0 le W1 l Sal v3,203,074 s/1965 Monaghan V- 1o1-415,1XR second slot and removable therefrom supported eX- 20 ternally of said drum t0 provide a Windup tension to FOREIGN PATENTS gesiliiegetcrccl 2100 tsecure a second edge of sa1d sheet 217,534 2/1942 Switzerland.
2. Apparatus according to claim 1 in which there is included drive means connected to said drum and opera- 25' BILLY I' WHHITE Pnmqry Examiner"

Claims (1)

1. SHEET TO DRUM CLAMPING MEANS COMPRISING: (A) A DRUM JOURNALED FOR ROTATION ABOUT AN AXIS IN A FRAME; (B) A FIRST LONGITUDINAL SLOT IN THE DRUM; (C) A CLAMP BAR SUPPORTED WITHIN SAID DRUM NORMALLY BIASED TO LIE WITHIN SAID FIRST SLOT AND HAVING A PLURALITY OF RAMP PORTIONS THEREON; (D) AN AXIALLY EXTENDING CAM SUPPORTED FOR MOVEMENT WITHIN SAID DRUM AND HAVING RAMP PORTIONS OPERATIVELY CONNECTED TO SAID CLAMP BAR RAMP PORTIONS TO MOVE SAID BAR OUTWARD FROM SAID SLOT TO RECEIVE A FIRST EDGE OF A SHEET OF FLEXIBLE MATERIAL AND TO MOVE SAID BAR INWARD INTO SAID SLOT TO SECURE SAID FIRST EDGE TO SAID DRUM; (E) A SECOND LONGITUDINAL SLOT IN THE SURFACE OF SAID DRUM ADJACENT TO SAID FIRST SLOT; AND (F) A WIPER BAR NORMALLY BIASED TO LIE WITHIN SAID SECOND SLOT AND REMOVABLE THEREFROM SUPPORTED EXTERNALLY OF SAID DRUM TO PROVIDE A WINDUP TENSION TO THE SHEET AND TO SECURE A SECOND EDGE OF SAID SHEET IN SAID SECOND SLOT.
US492223A 1965-10-01 1965-10-01 Drum clamp Expired - Lifetime US3348288A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US492223A US3348288A (en) 1965-10-01 1965-10-01 Drum clamp
GB43085/66A GB1123459A (en) 1965-10-01 1966-09-27 Drum clamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US492223A US3348288A (en) 1965-10-01 1965-10-01 Drum clamp

Publications (1)

Publication Number Publication Date
US3348288A true US3348288A (en) 1967-10-24

Family

ID=23955436

Family Applications (1)

Application Number Title Priority Date Filing Date
US492223A Expired - Lifetime US3348288A (en) 1965-10-01 1965-10-01 Drum clamp

Country Status (2)

Country Link
US (1) US3348288A (en)
GB (1) GB1123459A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618123A (en) * 1968-12-26 1971-11-02 Xerox Corp Facsimile drum conveyor
US3903795A (en) * 1972-06-17 1975-09-09 Ricoh Kk Device for clamping the trailing end portion of a sheet
US4161358A (en) * 1977-02-01 1979-07-17 Grafosol, S.p.A. Sheet supporting drum during development in machines for electrostatically preparing printing matrices
US4900008A (en) * 1986-12-22 1990-02-13 Polaroid Corporation Sheet clamping arrangement for rotatable drums
US20120069114A1 (en) * 2010-09-17 2012-03-22 Toshiba Tec Kabushiki Kaisha Image forming apparatus and image forming method

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2049917A (en) * 1932-03-03 1936-08-04 Bell Telephone Labor Inc Electrooptical system
US2051511A (en) * 1936-04-06 1936-08-18 William G H Finch Sheet mounting mechanism
CH217534A (en) * 1940-05-20 1941-10-31 Lorenz C Ag Device for stretching paper on a roller.
US2513409A (en) * 1947-10-21 1950-07-04 Times Facsimile Corp Facsimile recorder drum
US2514974A (en) * 1948-06-25 1950-07-11 Times Facsimile Corp Sheet holding mechanism for facsimile recorders and the like
US2622000A (en) * 1950-11-15 1952-12-16 Eastman Kodak Co Sheet clamping arrangement for facsimile apparatus
US2768579A (en) * 1952-07-26 1956-10-30 Tribune Company Lock-up device for flexible printing plates
US2979372A (en) * 1958-12-09 1961-04-11 Westrex Corp Record clamping and stripping mechanisms for facsimile machines and the like
US3203074A (en) * 1962-06-04 1965-08-31 Litton Systems Inc Sheet clamping arrangements

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2049917A (en) * 1932-03-03 1936-08-04 Bell Telephone Labor Inc Electrooptical system
US2051511A (en) * 1936-04-06 1936-08-18 William G H Finch Sheet mounting mechanism
CH217534A (en) * 1940-05-20 1941-10-31 Lorenz C Ag Device for stretching paper on a roller.
US2513409A (en) * 1947-10-21 1950-07-04 Times Facsimile Corp Facsimile recorder drum
US2514974A (en) * 1948-06-25 1950-07-11 Times Facsimile Corp Sheet holding mechanism for facsimile recorders and the like
US2622000A (en) * 1950-11-15 1952-12-16 Eastman Kodak Co Sheet clamping arrangement for facsimile apparatus
US2768579A (en) * 1952-07-26 1956-10-30 Tribune Company Lock-up device for flexible printing plates
US2979372A (en) * 1958-12-09 1961-04-11 Westrex Corp Record clamping and stripping mechanisms for facsimile machines and the like
US3203074A (en) * 1962-06-04 1965-08-31 Litton Systems Inc Sheet clamping arrangements

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618123A (en) * 1968-12-26 1971-11-02 Xerox Corp Facsimile drum conveyor
US3903795A (en) * 1972-06-17 1975-09-09 Ricoh Kk Device for clamping the trailing end portion of a sheet
US4161358A (en) * 1977-02-01 1979-07-17 Grafosol, S.p.A. Sheet supporting drum during development in machines for electrostatically preparing printing matrices
US4900008A (en) * 1986-12-22 1990-02-13 Polaroid Corporation Sheet clamping arrangement for rotatable drums
US20120069114A1 (en) * 2010-09-17 2012-03-22 Toshiba Tec Kabushiki Kaisha Image forming apparatus and image forming method

Also Published As

Publication number Publication date
GB1123459A (en) 1968-08-14

Similar Documents

Publication Publication Date Title
US3348288A (en) Drum clamp
JPH0254532B2 (en)
CH643795A5 (en) APPARATUS FOR ADVANCING CONTINUOUS FOLDING PAPER.
CA2065020A1 (en) Device for automatically clamping and releasing data supports and its operation
US4283021A (en) Automatic film retriever
US3961760A (en) Magazine for X-ray film sheets, comprising a rotatable storage drum
US2716153A (en) Facsimile scanner
US2662306A (en) Reading-training device
US3389402A (en) Front-loading heated stylus recorder
JPH0682973A (en) Containing cassette for long material
US1964632A (en) Recording instrument
US3380679A (en) Mat processor
DE3927162A1 (en) DEVICE FOR AUTOMATICALLY CLAMPING AND RELEASING OF RECORDING MATERIAL AND OPERATING MODE OF THE DEVICE
US2861862A (en) Dictation apparatus
US2919136A (en) Mounting arrangements for sheet records
JPH036918B2 (en)
JPH0444732B2 (en)
US865797A (en) Automatic photographic-printing device.
US2336909A (en) Facsimile recorder
US2420457A (en) Facsimile recorder
JP2001010021A (en) Apparatus for mounting printing plate material
JPS5919265A (en) Magnetic tape device
US6216975B1 (en) Processing arrangement for rolled up material
US3137539A (en) Recording devices
JPS6227587B2 (en)