US3854715A - Cam - Google Patents

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Publication number
US3854715A
US3854715A US00342640A US34264073A US3854715A US 3854715 A US3854715 A US 3854715A US 00342640 A US00342640 A US 00342640A US 34264073 A US34264073 A US 34264073A US 3854715 A US3854715 A US 3854715A
Authority
US
United States
Prior art keywords
drum
gripper bar
cam
gripper
rotating
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
US00342640A
Inventor
J Coleman
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 US00342640A priority Critical patent/US3854715A/en
Priority to NL7400809A priority patent/NL7400809A/xx
Priority to CA192,468A priority patent/CA1007256A/en
Priority to DE19742406591 priority patent/DE2406591A1/en
Priority to FR7408673A priority patent/FR2222812B1/fr
Priority to GB1157474A priority patent/GB1456576A/en
Priority to JP49030856A priority patent/JPS50111915A/ja
Application granted granted Critical
Publication of US3854715A publication Critical patent/US3854715A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • alfacsimiler'transceiver -unit. utilizing :a drum for conveying-sheet materiallpasua.scanning station, a gripper bar. .which rotatesvwithxthexdrum is conventionally V used forL-holdinguathesheet materialtotheadrum.
  • This gripper bar is "normally biasedt toward the 'drum andis raised away from-the jdrum by ;a camsurface when it is desired: to either remove: a sheet from theidrum' or place a;sheet incontact withttheadrum.
  • Suchiane arrangement isidisclosed;for-.exampIe,:ini.U;Si Pat.fN0.”3,6l8,123.111 1 a facsimile transceiver unit wherein documents-are automatically fed-ontoandaoff thetdrum, tsuch ias' that disclosed in.copending application:SerZ'No.. .253 ,72'1 filed Mayv l 6, 1972, and; assigned to theassigneeoftheapresent;-invention:now-U;S1' 'Iat. No. 3 ⁇ 790,1 59,!
  • Gripper bar is utilized'to hold ,sheet material" against drum l7'and is described in detail intheaforementioned US. Pat. No.3,6l8,'123.
  • Lever arm is pivotably supported on shaft 27-and includes cam surface 28at one end thereof. At the other end of lever arm- 25 is surface 29. When surface '29 ismoved down, surface 28 engages the lower 7 end of gripper bar 20, thereby raising gripper bar'20 this-angular position.
  • Cam surface 28 is arranged to have a radial inclination so that when raised,
  • drum 17 may be rotated ina clockwise direction and gripper bar 20 will ride up on cam surface 28. However, whendrum 17 is at rest'and cam surface 28 is raised, it will only raise gripper bar 20 invthe angular position at whichit is at rest, making no adjustment of
  • FIG. 2 depicted therein is the apparatusof FIG. 1 wherein an improved cam surface 30 embodying the principles of this invention is employed.
  • the illustrated apparatus is utilized in an automatic facsimile transceiver such as that disclosed in the aforementioned US. Pat. No. 3,790,159, it is necessary forming this functionmay illustratively be of the type disclosedin the aforementioned copending application Ser. No. 253,726.
  • This illustrative control apparatus 50 stops the drum within an angular window of approxitmentioned,.copendinggapplicatim .will:stop.the :drumso "mately 8 before the topmost position.
  • lrlowevergfor"maximumrsheet ifeedingqeliability .itisvdesirable;tothave.atherdrumsstopped so'rthat iithe gripperban is ataa :particular i-location within "thatwindow,
  • cam surface configuration aislprovided for gripper bar20closer to the topmost position
  • cam surfore when lever arm 25 is pivoted, the inclination of surface 32 will force gripper bar 20 so that its bottom end will be moved into the notch to point 33, thereby both raising the-tgripper bmiandlmovingthesdrum so 40 rotating drum '17 and'consequently gripper bar 20 to that thegfriplpertbar isvbrought to .a predetermined location within the angularawindow-inrwhich'the gripper bar is initially stopped.
  • the cam surface 1 comprises two rampsforminganotchxtherebetween. When the cam surface is raised against "the lower send-of the gripper bar, this lower endzlis.forced:into-:.thenotch; thereby moving-the gripper bar to the predetermined location as it is raised.
  • FIG. 2 depicts illustrative apparatus-employing a cam embodying the principles of this invention wherein the cam is in an unengaged position
  • FIG. 3 depicts the-apparatus ofFIG 2 wherein the camis in an engaged position
  • FIG. 4 is a perspective -vie.w of' the illustrative cam shown in FIGS. .2and: 3.1. g
  • FIG/4 is a perspective view'of lever arm 25 having improved cam surface 30 thereon.
  • a gripper bar extending through the surface of said I drum and rotating with said drum, said gripper bar being biased toward the center of said drum for engaging an edge of saidzsheet material in fixed relationship to said drum surface, and means for simultaneously moving said gripper bar radially outward from said drum and rotating said drum to a predetermined angular position including acam movable from a first to a secondposition, said cam having a notched surface for engagement with said gripper bar as said cam is moved from 2.
  • said cam sursaid first position to said second position, said first position being closer to the center of said drum and farther from the surface of said drum than said sec- Spec to one another so as to form mtch' nd position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Handling Of Cut Paper (AREA)

Abstract

A facsimile transceiver unit utilizing a drum wherein the drum gripper bar must be at a predetermined location when the drum is brought to a stop. Control circuitry stops the drum with the gripper bar within a certain window. An improved cam surface raises the gripper bar while at the same time rotating the drum so that the gripper bar is moved to a predetermined location within the window.

Description

United States Patent [191 11] 3,854,715 Coleman Dec. 17 1974 [54] CAM 2,666,808 l/l954 Cooley 346/l38 X 1 l B dd d 3' [75] Inventor: John F. Coleman, Rochester, NY. 3618l23 1/1971 u en eck 46/138 [73] Assignee: Xerox Corporation, Stamford, P i Examiner Ev r C, Blunk Conn- Assistant ExaminerBruce H. Stoner, Jr. [22] Filed:- Mar. 19, 1973 21 Appl. No.: 342,640 5 3 ABSTRACT A vfacsimile transceiver unit utilizing a drum wherein the drum gripper bar must be at a predetermined loca- L 1 ifi tion when the drum is brought to a stop. Control cir- [58] Field of Search 271/53, 82;,346/138, 125, mp3 drum with gripper bar a [56] References Cited UNITED STATES PATENTS 2,622,517 12/1952 Denison et 346/138 X certain window. An improved cam surface raises the gripper bar while at the same time rotating the drum so that the gripper bar is moved to a predetermined location within the window.
2 Claims, 4 Drawing Figures morev particularly;- to. :an zimproved.cam contiguration for impartingtwo directionsv ofirnovementto a cooperating-member.
In; alfacsimiler'transceiver -unit. utilizing :a drum for conveying-sheet materiallpasua.scanning station, a gripper bar. .which rotatesvwithxthexdrum is conventionally V used forL-holdinguathesheet materialtotheadrum. This gripper baris "normally biasedt toward the 'drum andis raised away from-the jdrum by ;a camsurface when it is desired: to either remove: a sheet from theidrum' or place a;sheet incontact withttheadrum. Suchiane arrangement isidisclosed;for-.exampIe,:ini.U;Si Pat.fN0."3,6l8,123.111 1 a facsimile transceiver unit wherein documents-are automatically fed-ontoandaoff thetdrum, tsuch ias' that disclosed in.copending application:SerZ'No.. .253 ,72'1 filed Mayv l 6, 1972, and; assigned to theassigneeoftheapresent;-invention:now-U;S1' 'Iat. No. 3 {790,1 59,! it is necessary.tostop the drumsataapredeterminedlangular position ,so (that theagripper banisiinthe propenplace to receive sheets; lllustrativecontrol:apparatusfor performingagthis :positioning function.;is..disclosed Jin v:copendin'g .abandoned,,andassignedgtoa the assignee-of the-present invention.v The apparatus :disclosedF in the last- I s a s-4,715
2 H tatingon shaft 10. Gripper bar is utilized'to hold ,sheet material" against drum l7'and is described in detail intheaforementioned US. Pat. No.3,6l8,'123. Spring'23biases gripper bar20 against the surface of drum 17. Lever arm is pivotably supported on shaft 27-and includes cam surface 28at one end thereof. At the other end of lever arm- 25 is surface 29. When surface '29 ismoved down, surface 28 engages the lower 7 end of gripper bar 20, thereby raising gripper bar'20 this-angular position.
away from drum surface 17. Cam surface 28 is arranged to have a radial inclination so that when raised,
drum 17 'may be rotated ina clockwise direction and gripper bar 20 will ride up on cam surface 28. However, whendrum 17 is at rest'and cam surface 28 is raised, it will only raise gripper bar 20 invthe angular position at whichit is at rest, making no adjustment of Turning now to'FIG. 2, depicted therein is the apparatusof FIG. 1 wherein an improved cam surface 30 embodying the principles of this invention is employed. When'the illustrated apparatus is utilized in an automatic facsimile transceiver such as that disclosed in the aforementioned US. Pat. No. 3,790,159, it is necessary forming this functionmay illustratively be of the type disclosedin the aforementioned copending application Ser. No. 253,726. This illustrative control apparatus 50 stops the drum within an angular window of approxitmentioned,.copendinggapplicatim .will:stop.the :drumso "mately 8 before the topmost position. In order to bring asrto positionctheggripperJbar @within"a-icertain ian'gular window. lrlowevergfor"maximumrsheet ifeedingqeliability .itisvdesirable;tothave.atherdrumsstopped so'rthat iithe gripperban is ataa :particular i-location within "thatwindow,
SUMMARY -OF"THEEINVENTIGN In accordance With'ith principles *ofz this invention,
Y an improved cam surface configuration aislprovided for gripper bar20closer to the topmost position, cam surfore, when lever arm 25 is pivoted, the inclination of surface 32 will force gripper bar 20 so that its bottom end will be moved into the notch to point 33, thereby both raising the-tgripper bmiandlmovingthesdrum so 40 rotating drum '17 and'consequently gripper bar 20 to that thegfriplpertbar isvbrought to .a predetermined location within the angularawindow-inrwhich'the gripper bar is initially stopped. The cam surface 1 comprises two rampsforminganotchxtherebetween. When the cam surface is raised against "the lower send-of the gripper bar, this lower endzlis.forced:into-:.thenotch; thereby moving-the gripper bar to the predetermined location as it is raised.
DESCRIPTION OF'THE DRAWING The foregoing .willkbecomemore readily apparent upon reading -.;the following description in conjunction with the drawing in which FIG. ldepicts illustrative priorart-apparatus utilizing a cam to raisea gripper-bar,
FIG. 2 depicts illustrative apparatus-employing a cam embodying the principles of this invention wherein the cam is in an unengaged position, I
FIG. 3 depicts the-apparatus ofFIG 2 wherein the camis in an engaged position, and
FIG. 4 is a perspective -vie.w of' the illustrative cam shown in FIGS. .2and: 3.1. g
DESGRIPTION' 0F THELIILLUSTRATIVE' EMBODIMENT-"1 Referring-t0 FlG-- 1', depictedtherein is a portion of a prior art facsimile transceiver includingdrum l7 rothe topmost position of the 8 angular window, as shown in FIG. 3. Y
FIG/4 is a perspective view'of lever arm 25 having improved cam surface 30 thereon.
Accordingly, there has been shown an improved cam surface for imparting both radial and angular motion to v a rotatable drum for conveying sheet material,
a gripper bar extending through the surface of said I drum and rotating with said drum, said gripper bar being biased toward the center of said drum for engaging an edge of saidzsheet material in fixed relationship to said drum surface, and means for simultaneously moving said gripper bar radially outward from said drum and rotating said drum to a predetermined angular position including acam movable from a first to a secondposition, said cam having a notched surface for engagement with said gripper bar as said cam is moved from 2. The combination of claim 1 wherein said cam sursaid first position to said second position, said first position being closer to the center of said drum and farther from the surface of said drum than said sec- Spec to one another so as to form mtch' nd position. 5
face includes a pair of ramp surfaces inclined with re-

Claims (2)

1. In facsimile apparatus, the combination comprising a rotatable drum for conveying sheet material, a gripper bar extending through the surface of said drum and rotating with said drum, said gripper bar being biased toward the center of said drum for engaging an edge of said sheet material in fixed relationship to said drum surface, and means for simultaneously moving said gripper bar radially outward from said drum and rotating said drum to a predetermined angular position including a cam movable from a first to a second position, said cam having a notched surface for engagement with said gripper bar as said cam is moved from said first position to said second position, said first position being closer to the center of said drum and farther from the surface of said drum than said second position.
2. The combination of claim 1 wherein said cam surface includes a pair of ramp surfaces inclined with respect to one another so as to form a notch.
US00342640A 1973-03-19 1973-03-19 Cam Expired - Lifetime US3854715A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00342640A US3854715A (en) 1973-03-19 1973-03-19 Cam
NL7400809A NL7400809A (en) 1973-03-19 1974-01-21
CA192,468A CA1007256A (en) 1973-03-19 1974-02-12 Cam
DE19742406591 DE2406591A1 (en) 1973-03-19 1974-02-12 FACSIMILE RECEIVER
FR7408673A FR2222812B1 (en) 1973-03-19 1974-03-14
GB1157474A GB1456576A (en) 1973-03-19 1974-03-15 Sheet conveying apparatus
JP49030856A JPS50111915A (en) 1973-03-19 1974-03-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00342640A US3854715A (en) 1973-03-19 1973-03-19 Cam

Publications (1)

Publication Number Publication Date
US3854715A true US3854715A (en) 1974-12-17

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ID=23342652

Family Applications (1)

Application Number Title Priority Date Filing Date
US00342640A Expired - Lifetime US3854715A (en) 1973-03-19 1973-03-19 Cam

Country Status (7)

Country Link
US (1) US3854715A (en)
JP (1) JPS50111915A (en)
CA (1) CA1007256A (en)
DE (1) DE2406591A1 (en)
FR (1) FR2222812B1 (en)
GB (1) GB1456576A (en)
NL (1) NL7400809A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111119A (en) * 1976-04-05 1978-09-05 Olympus Optical Co., Ltd. Record sheet clamping mechanism for drum type facsimile and the like
FR2402983A1 (en) * 1977-09-08 1979-04-06 Minnesota Mining & Mfg METHOD AND APPARATUS FOR REMOVABLE FIXING A SHEET ON THE DRUM OF A FAC-SIMILAR APPARATUS
US4386771A (en) * 1981-05-08 1983-06-07 Xerox Corporation Method of removing a sheet from a drum
US4517575A (en) * 1981-04-20 1985-05-14 Matsushita Electric Industrial Co., Ltd. Recording paper clamping apparatus
US4694748A (en) * 1985-11-14 1987-09-22 Fujirex Company, Limited Device for moving offset plates
US4900008A (en) * 1986-12-22 1990-02-13 Polaroid Corporation Sheet clamping arrangement for rotatable drums
US20090035046A1 (en) * 2007-07-31 2009-02-05 Belbey Jason S Print drum

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928105B2 (en) * 1975-06-11 1984-07-10 オリンパス光学工業株式会社 Original loading/unloading mechanism for cylindrical scanning facsimile

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622517A (en) * 1947-09-02 1952-12-23 Speed O Print Corp Duplicator master sheet clamp and control means therefor
US2666808A (en) * 1950-07-18 1954-01-19 Times Facsimile Corp Facsimile machine
US3618123A (en) * 1968-12-26 1971-11-02 Xerox Corp Facsimile drum conveyor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622517A (en) * 1947-09-02 1952-12-23 Speed O Print Corp Duplicator master sheet clamp and control means therefor
US2666808A (en) * 1950-07-18 1954-01-19 Times Facsimile Corp Facsimile machine
US3618123A (en) * 1968-12-26 1971-11-02 Xerox Corp Facsimile drum conveyor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111119A (en) * 1976-04-05 1978-09-05 Olympus Optical Co., Ltd. Record sheet clamping mechanism for drum type facsimile and the like
FR2402983A1 (en) * 1977-09-08 1979-04-06 Minnesota Mining & Mfg METHOD AND APPARATUS FOR REMOVABLE FIXING A SHEET ON THE DRUM OF A FAC-SIMILAR APPARATUS
US4179118A (en) * 1977-09-08 1979-12-18 Minnesota Mining And Manufacturing Company Apparatus and method for releasably securing sheet material to the drum of a drum-type facsimile machine
US4517575A (en) * 1981-04-20 1985-05-14 Matsushita Electric Industrial Co., Ltd. Recording paper clamping apparatus
US4386771A (en) * 1981-05-08 1983-06-07 Xerox Corporation Method of removing a sheet from a drum
US4694748A (en) * 1985-11-14 1987-09-22 Fujirex Company, Limited Device for moving offset plates
US4900008A (en) * 1986-12-22 1990-02-13 Polaroid Corporation Sheet clamping arrangement for rotatable drums
US20090035046A1 (en) * 2007-07-31 2009-02-05 Belbey Jason S Print drum

Also Published As

Publication number Publication date
FR2222812B1 (en) 1978-06-16
JPS50111915A (en) 1975-09-03
CA1007256A (en) 1977-03-22
GB1456576A (en) 1976-11-24
DE2406591A1 (en) 1974-10-03
NL7400809A (en) 1974-03-25
FR2222812A1 (en) 1974-10-18

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