US3265387A - Supervisory device for supervising a sheet stack of a sheet printing press - Google Patents

Supervisory device for supervising a sheet stack of a sheet printing press Download PDF

Info

Publication number
US3265387A
US3265387A US404457A US40445764A US3265387A US 3265387 A US3265387 A US 3265387A US 404457 A US404457 A US 404457A US 40445764 A US40445764 A US 40445764A US 3265387 A US3265387 A US 3265387A
Authority
US
United States
Prior art keywords
stack
sensor
sheet
printing press
supervising
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
US404457A
Inventor
Alix Hans
Schuhmann 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.)
Roland Offsetmaschinenfabrik Faber and Schleicher AG
Original Assignee
Roland Offsetmaschinenfabrik Faber and Schleicher AG
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 Roland Offsetmaschinenfabrik Faber and Schleicher AG filed Critical Roland Offsetmaschinenfabrik Faber and Schleicher AG
Application granted granted Critical
Publication of US3265387A publication Critical patent/US3265387A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/08—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
    • B65H1/18—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device controlled by height of pile

Definitions

  • the present invention relates to a device for supervising the height of a sheet stack in a sheet feeding device for a sheet printing press.
  • a beam of light is directed upon a light-sensitive receiver such as a suitable photocell.
  • the direction of the beam is so adjusted that the intensity of the light received by the photocell is controlled by the height of the stack and that when the received light departs from a predetermined value, either by being too high (low stack) or too low (high stack), the photocell by means of an amplifier actuates control means which, in turn, initiate suitable control functions.
  • a transmitting ultrasonic sensor which directs an ultrasonic beam upon one side of the stack of sheets and a receiving ultrasonic sensor which receives the sound energy reflected by said side of the stack.
  • the second sensor is connected to a control means which initiates suitable control actions in response to a departure of the reflected sound energy from a predetermined value.
  • the sensors are positioned in accordance with the de-.
  • sired height of the stack and are preferably mounted on a common holder adjustable as to height which may be supported on a frame portion of the press.
  • FIG. 1 is a diagrammatic elevational view of the feed device of a sheet printing press equipped with a supervisory device according to the invention.
  • FIG. 2 is a diagrammatic plan view of FIG. 1, and
  • FIG. 3 shows a circuit diagram of the supervisory device.
  • the side walls 1 and 2 of the frame structure of the sheet feeding device support a feed table or board 3 upon which rests a stack of sheets 4.
  • Table or board 3 is supported at its four corners by chains 5 guided over pulleys 6 and 7.
  • Table 3 may be lifted or lowered by a control means shown as a power drive including a worm gearing 8 and a motor 9.
  • Ultrasonic sensors 10 and 11 are mounted on a common holder 12.
  • the holder is secured, adjustable as to height, to side wall 1 by suitable means shown as an elongated slot 13 and a setscrew 14.
  • Sensor 10 constitutes a transmitter which directs an ultrasonic beam upon a side wall of stack 4 and sensor 11 constitutes a receiver which receives the sound energy reflected by the side wall. As it is clearly shown in FIG. 2, neither of the two sensors is in contact with the respective side wall of the stack.
  • Ultrasonic equipment of the kind here involved is Well known in the art and generally available in the market. It is marketed for instance by Delavan Manufacturing Company of West Des Moines, Iowa, and described in literature issued by this firm.
  • the transmitting sensor of such equipment when suitably energized converts electric encrgy to ultrasonic energy and the receiving sensor, which must of course be matched with the transmitting sensor, converts the received ultrasonic waves to electrical energy.
  • the sound energy used in equipment of this kind is well above the range of human hearing, such as 35,000 cycles per second and more.
  • FIG. 3 shows a casing 15 which should be visualized as containing a suitable con venti on-al generator supplying the required electric energy to sensor 10 and also a suitable amplifier such as a transistorized amplifier connected to sensor 11.
  • a suitable con venti on-al generator supplying the required electric energy to sensor 10
  • a suitable amplifier such as a transistorized amplifier connected to sensor 11.
  • the energy supplied to sensor 10 and the gain of the amplifier are preferably adjustable, as it is indicated by a knob 16 and a scale.
  • the output of the amplifier controls the operation of motor 9 and is so adjusted that the motor remains at a standstill when the amplifier output is at a predetermined value, but is started when the output departs from said predetermined value.
  • the magnitude of the sound energy received by sensor 11 is controlled by the position of the stack and, more specifically, of its upper edge in relation to the sensors.
  • the device can be conveniently so set that motor 9 is started when the stack is depleted below a predetermined level.
  • the cut-in point of the motor can also be controlled by varying the height of the sensors in reference to the stack by means of holder 12.
  • a device supervising the height of a stack of sheets for use in a sheet printing press comprising an ultrasonic sensor constituting a transmitter for directing an ultrasonic beam upon one side of the stack to be supervised, means for mounting said transmitter adjacent to but spaced apart from said side of the stack, means for supplying electric energy to the sensor, a second ultrasonic sensor constituting a receiver for receiving sound energy reflected by said side of the stack, mounting means for mounting said receiver adjacent to but spaced apart from said side of the stack, amplifying means connected to said second sensor and controlled by the magnitude of the sound energy received by said sensor, and control means connected in circuit With said amplifying means and operated in response to a departure of the magnitude of the reflected sound energy from a predetermined value.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Pile Receivers (AREA)

Description

1966 H ALIX ETAL 3,265,387 T SUPERVISORY DEX/ ICE FOR SUPERVISING A SHEE STACK OF A SHEET PRINTING PRESS Filed Oct. 16, 1964 In ven fors 1 N5 fix. X
Sue FRIED fcuuu/vn/wv tates 2 Claims. cl. 271 s2 The present invention relates to a device for supervising the height of a sheet stack in a sheet feeding device for a sheet printing press.
There are known devices for that purpose in which a beam of light is directed upon a light-sensitive receiver such as a suitable photocell. The direction of the beam is so adjusted that the intensity of the light received by the photocell is controlled by the height of the stack and that when the received light departs from a predetermined value, either by being too high (low stack) or too low (high stack), the photocell by means of an amplifier actuates control means which, in turn, initiate suitable control functions.
The principal disadvantage of such light control devices is that they are sensitive to the ambient illumination. Unless they are very carefully shieldedand that is difiicult and expensive in practice-stray light, in particular sunlight, may affect the device to such an extent that it becomes unreliable. Furthermore, light-sensitive devices are strongly affected by the color and light-reflecting properties of the stacked sheet material to be supervised. Obviously, a faulty operation of the control system for the press such as a cut-off device may result in damage to the press and in a disturbance of the entire printing operation. Supervisory devices using photocells are also affected by the unavoidable aging of the light bulb used to produce the light beam and the presence of dust on either the light transmitter or the light receiver. Since powdered material is frequently used in connection with the operation of a printing press, sensitivity to dust is an important factor.
It is a broad object of the invention to provide a novel and improved supervisory device of the general kind above referred to which is independent of the ambient light conditions, not subject to aging, rugged in construction and which is not affected by the color or the lightreflecting properties of the sheet material to be supervised.
The afore-pointed out objects, features and advantages and other objects, features and advantages which will be pointed out hereinafter are attained by providing a transmitting ultrasonic sensor which directs an ultrasonic beam upon one side of the stack of sheets and a receiving ultrasonic sensor which receives the sound energy reflected by said side of the stack. The second sensor is connected to a control means which initiates suitable control actions in response to a departure of the reflected sound energy from a predetermined value.
The sensors are positioned in accordance with the de-.
sired height of the stack and are preferably mounted on a common holder adjustable as to height which may be supported on a frame portion of the press.
In the accompanying drawing a preferred embodiment of the invention is shown by way of illustration and not by way of limitation.
in the drawing:
FIG. 1 is a diagrammatic elevational view of the feed device of a sheet printing press equipped with a supervisory device according to the invention.
3,265,337 Patented August 9, 1966 FIG. 2 is a diagrammatic plan view of FIG. 1, and
FIG. 3 shows a circuit diagram of the supervisory device.
Only those components of the feeding device of the press are shown which are essential for the understanding of the invention. The operation of the sheet feeding device other than here described should be visualized as also being conventional.
Referring now in detail to the figures, the side walls 1 and 2 of the frame structure of the sheet feeding device support a feed table or board 3 upon which rests a stack of sheets 4. Table or board 3 is supported at its four corners by chains 5 guided over pulleys 6 and 7. Table 3 may be lifted or lowered by a control means shown as a power drive including a worm gearing 8 and a motor 9.
Ultrasonic sensors 10 and 11 are mounted on a common holder 12. The holder is secured, adjustable as to height, to side wall 1 by suitable means shown as an elongated slot 13 and a setscrew 14.
Sensor 10 constitutes a transmitter which directs an ultrasonic beam upon a side wall of stack 4 and sensor 11 constitutes a receiver which receives the sound energy reflected by the side wall. As it is clearly shown in FIG. 2, neither of the two sensors is in contact with the respective side wall of the stack.
Ultrasonic equipment of the kind here involved is Well known in the art and generally available in the market. It is marketed for instance by Delavan Manufacturing Company of West Des Moines, Iowa, and described in literature issued by this firm.
The transmitting sensor of such equipment when suitably energized converts electric encrgy to ultrasonic energy and the receiving sensor, which must of course be matched with the transmitting sensor, converts the received ultrasonic waves to electrical energy.
The sound energy used in equipment of this kind is well above the range of human hearing, such as 35,000 cycles per second and more.
Turning now to FIG. 3, this figure shows a casing 15 which should be visualized as containing a suitable con venti on-al generator supplying the required electric energy to sensor 10 and also a suitable amplifier such as a transistorized amplifier connected to sensor 11. The energy supplied to sensor 10 and the gain of the amplifier are preferably adjustable, as it is indicated by a knob 16 and a scale.
The output of the amplifier controls the operation of motor 9 and is so adjusted that the motor remains at a standstill when the amplifier output is at a predetermined value, but is started when the output departs from said predetermined value.
As it is evident from the previous description and an examination of FIG. 1, the magnitude of the sound energy received by sensor 11 is controlled by the position of the stack and, more specifically, of its upper edge in relation to the sensors. As it is also evident, the device can be conveniently so set that motor 9 is started when the stack is depleted below a predetermined level. The cut-in point of the motor can also be controlled by varying the height of the sensors in reference to the stack by means of holder 12.
While the invention has been described in detail with respect to a certain now preferred example and embodiment of the invention, it will be understood by those skilled in the art, after understanding the invention, that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended therefore to cover all such changes and modifications in the appended claims.
What is claimed as new and desired to be secured by Letters Patent is:
1. A device supervising the height of a stack of sheets for use in a sheet printing press, said device comprising an ultrasonic sensor constituting a transmitter for directing an ultrasonic beam upon one side of the stack to be supervised, means for mounting said transmitter adjacent to but spaced apart from said side of the stack, means for supplying electric energy to the sensor, a second ultrasonic sensor constituting a receiver for receiving sound energy reflected by said side of the stack, mounting means for mounting said receiver adjacent to but spaced apart from said side of the stack, amplifying means connected to said second sensor and controlled by the magnitude of the sound energy received by said sensor, and control means connected in circuit With said amplifying means and operated in response to a departure of the magnitude of the reflected sound energy from a predetermined value.
References Cited by the Examiner UNITED STATES PATENTS 2,639,150 5/1953 Aber-le 27162 2,833,540 5/1958 Koch 27162 3,110,009 11/1963 Bolton 3401 X 3,149,561 9/1964 Lancaster 340-1 X 3,172,075 3/1965 Kay 340-1 M. HENSON WOOD, JR., Primary Examiner.
J. N. ERLICH, Assistant Examiner.

Claims (1)

1. A DEVICE SUPERVISING THE HEIGHT OF A STACK OF SHEETS FOR USE IN A SHEET PRINTING PRESS, SAID DEVICE COMPRISING AN ULTRASONIC SENSOR CONSTITUTING A TRANSMITTER FOR DIRECTING AN ULTRASONIC BEAM UPON ONE SIDE OF THE STACK TO BE SUPERVISED, MEANS FOR MOUNTING SAID TRANSMITTER ADJACENT TO BUT SPACED APART FROM SAID SIDE OF THE STACK, MEANS FOR SUPPLYING ELECTRIC ENERGY TO THE SENSOR, A SECOND ULTRASONIC SENSOR CONSTITUTING A RECEIVER FOR RECEIVING SOUND ENERGY REFLECTED BY SAID SIDE OF THE STACK, MOUNTING MEANS FOR MOUNTING SAID RECEIVER ADJACENT TO BUT SPACEWD APART FROM SAID SIDE OF THE STACK, AMPLIFYING MEANS CONNECTED TO SAID SECOND SENSOR AND CONTROLLED BY THE MAGNITUDE OF THE SOUND ENERGY RECEIVED BY SAID SENSOR, AND CONTROL MEANS CONNECTED IN CIRCUIT WITH SAID AMPLIFYING MEANS AND OPERATED IN RESPONSE TO A DEPARTURE OF THE MAGNITUDE OF THE REFLECTED SOUND ENERGY FROM A PREDETERMINED VALUE.
US404457A 1963-11-07 1964-10-16 Supervisory device for supervising a sheet stack of a sheet printing press Expired - Lifetime US3265387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER36513A DE1189088B (en) 1963-11-07 1963-11-07 Device for sensing the height of stacks of sheets

Publications (1)

Publication Number Publication Date
US3265387A true US3265387A (en) 1966-08-09

Family

ID=7404924

Family Applications (1)

Application Number Title Priority Date Filing Date
US404457A Expired - Lifetime US3265387A (en) 1963-11-07 1964-10-16 Supervisory device for supervising a sheet stack of a sheet printing press

Country Status (4)

Country Link
US (1) US3265387A (en)
CH (1) CH414692A (en)
DE (1) DE1189088B (en)
GB (1) GB1023243A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759177A (en) * 1971-10-12 1973-09-18 American Bank Note Co Printing press with sheet inspection station
US3876969A (en) * 1973-10-04 1975-04-08 Jr James R Price Safety device

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD115336A1 (en) * 1974-03-28 1975-09-20
DD124786A1 (en) * 1976-03-15 1977-03-16
IT1117491B (en) 1977-06-21 1986-02-17 Cevolani Spa Off DEVICE FOR THE AUTOMATIC FORMATION OF STACKS OF STRIPS OUT OF A MACHINE FOR THE REALIZATION OF THE SAME
IT1142289B (en) * 1981-02-05 1986-10-08 Giampiero Giusti AUTOMATIC HIGH SPEED FORMATION AND EXPULSION EQUIPMENT OF SHEET STACKS
AT398308B (en) * 1988-03-14 1994-11-25 Lisec Peter DEVICE FOR COATING SPACER FRAME
JPH02265825A (en) * 1989-04-06 1990-10-30 Ricoh Co Ltd Paper supply tray lift
DE8912277U1 (en) 1989-10-16 1989-11-30 Maschinenbau Oppenweiler Binder GmbH & Co, 7155 Oppenweiler Pallet feeder
DE4010985A1 (en) * 1990-04-05 1991-10-10 Spiess Gmbh G Lifting device for sheet stacking table - uses lifting chains controlled by stepping motor and auxiliary deflectors
DE10028523B4 (en) * 1999-07-05 2008-12-18 Heidelberger Druckmaschinen Ag Apparatus for measuring the height of a sheet pile using a retroreflective radiation detector
US6349936B1 (en) 2000-06-08 2002-02-26 Heidelberger Druckmaschinen Device for measuring the height of a sheet pile by using a reflectively operating radiation detector
DE102005057364A1 (en) * 2005-12-01 2007-06-06 Koenig & Bauer Ag Sheet stacking surface level controlling device for sheet printing machine, has stack lifting device controlled by sensor such that stacking surface remains in target level allowable by sensor level that is remotely adjusted using drive

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639150A (en) * 1947-12-15 1953-05-19 Southworth Machine Co Skid lift
US2833540A (en) * 1953-07-06 1958-05-06 Roland Offsetmaschf Stacking device for printing and the like machines
US3110009A (en) * 1960-08-29 1963-11-05 Gen Signal Corp Ultrasonic vehicle detector system
US3149561A (en) * 1961-02-23 1964-09-22 Pannier Corp Apparatus for supersonically specifically locating and printing on objects
US3172075A (en) * 1959-11-27 1965-03-02 Nat Res Dev Apparatus for furnishing information as to positioning of objects

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1089329B (en) * 1957-01-05 1960-09-15 Smith Paper Mills Ltd Howard Device for the constant stacking and counting of sheets of paper with a lowering device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639150A (en) * 1947-12-15 1953-05-19 Southworth Machine Co Skid lift
US2833540A (en) * 1953-07-06 1958-05-06 Roland Offsetmaschf Stacking device for printing and the like machines
US3172075A (en) * 1959-11-27 1965-03-02 Nat Res Dev Apparatus for furnishing information as to positioning of objects
US3110009A (en) * 1960-08-29 1963-11-05 Gen Signal Corp Ultrasonic vehicle detector system
US3149561A (en) * 1961-02-23 1964-09-22 Pannier Corp Apparatus for supersonically specifically locating and printing on objects

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759177A (en) * 1971-10-12 1973-09-18 American Bank Note Co Printing press with sheet inspection station
US3876969A (en) * 1973-10-04 1975-04-08 Jr James R Price Safety device

Also Published As

Publication number Publication date
DE1189088B (en) 1965-03-18
CH414692A (en) 1966-06-15
GB1023243A (en) 1966-03-23

Similar Documents

Publication Publication Date Title
US3265387A (en) Supervisory device for supervising a sheet stack of a sheet printing press
US3908129A (en) Manometer level detector
ATE48044T1 (en) SMOKE DETECTOR.
FR2290671A1 (en) CIRCUIT FOR AUTOMATIC LEVEL ADJUSTMENT OF PULSE RADIATION OPTICAL DETECTORS, FOR EXAMPLE FOR MONITORING DEVICES
SE7402085L (en)
US3948170A (en) Arrangement in silkscreen printing machine
GB1117058A (en) Improvements in or relating to electronic flash apparatus for use in photography and to light responsive control circuits for use in such apparatus
US3599521A (en) Automatic film cutter
US2259502A (en) Material handling mechanism
GB1481714A (en) Document detection apparatus
AT317264B (en) Suction air control on sheet feeders
US2593204A (en) Sound control system
US2835549A (en) Graphical recording apparatus
US2583737A (en) Photoelectric recording device
US2916703A (en) Photoelectric sensing device
US3423592A (en) Distance measuring means using light beams
US2940027A (en) Transistor oscillator circuit
SU147778A1 (en) Photoelectric device for automatic control of the geometric dimensions of parts
GB1029467A (en) An automatic exposure adjusting device in cine cameras
GB993802A (en) Method of finding the exposure time when making a contact print or enlargement on diazotype material, and an apparatus for carrying out said method
JPH0342422A (en) Sheet feeder
US3777151A (en) Method and apparatus for scanning surfaces
JPS56126853A (en) Paper feed device of copying macine and the like
GB815116A (en) Improvements in moving-indicator measuring or indicating instruments
GB722384A (en) Apparatus for gaging and classifying sheets or the like