US3809907A - Calender roll apparatus with device for controlling the thickness of the bank of material in front of the rolling gap - Google Patents

Calender roll apparatus with device for controlling the thickness of the bank of material in front of the rolling gap Download PDF

Info

Publication number
US3809907A
US3809907A US00278438A US27843872A US3809907A US 3809907 A US3809907 A US 3809907A US 00278438 A US00278438 A US 00278438A US 27843872 A US27843872 A US 27843872A US 3809907 A US3809907 A US 3809907A
Authority
US
United States
Prior art keywords
bank
plane
rolls
gap
detector
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
US00278438A
Other languages
English (en)
Inventor
R Schuller
H Kopsch
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.)
BKMI Industrieanlagen GmbH
Original Assignee
Krauss Maffei 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 Krauss Maffei AG filed Critical Krauss Maffei AG
Application granted granted Critical
Publication of US3809907A publication Critical patent/US3809907A/en
Assigned to BKMI INDUSTRIEANLAGEN GMBH, A LIMITED-LIABILITY COMPANY OF GERMANY reassignment BKMI INDUSTRIEANLAGEN GMBH, A LIMITED-LIABILITY COMPANY OF GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KRAUSS-MAFFEI AKTIENGESELLSCHAFT
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
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/24—Calendering
    • B29C43/245—Adjusting calender parameters, e.g. bank quantity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures

Definitions

  • a device for controlling the bank of viscous material in front of the nip of a pair of calender rolls comprises a source of coherent radiation which is trained, across a surface of the rolling bank turned away from the nip,
  • the source of coherent radiation is preferably a laser beam while the receiver is a photoa cell arrangement juxtaposed with the source which is oscillated to sweep the beam angularly or is reciprocatedat high frequency to reciprocate the beam in a plane generally perpendicular to the plane of the roll axes.
  • the present invention relates to calendering apparatusand, more-particularly, to a calender-roll arrangement providedwith a device for monitoring the thickness of the bank of viscous material collecting ahead of the nip or gap between the rolls, and feeding through the latter to form a foil or band.
  • the viscous material may circulate until it enters the gap and, when the bank is too thick, such movement often carries the viscous materials away from the nip for a period sufficient to cause cooling. This substantially reduces the quality of the final foil.
  • Another object of the invention is to provide a calender-roll apparatus with an improved system for controlling the calendering operation in accordance with the condition of the bank of viscous materials built up ahead of the nip or gap.
  • Still another object of the invention is to provide a sensingdevice for the bank of viscous materials ahead of the nip of a pair of calendering rolls which will be less sensitive to environmental and other potentially interfering influences associated with the calendering of viscous materials to produce bands or foils that has been thecase heretofore and which also is highly accurate, has a short response time and does not detrimen tally affect the bank.
  • the signal conditions operating control means determining the rate at which the viscous materials traverses the calendering ,roll arrangement and hence restoring the bank or otherwise modifying the calendering operation, eg by preventing the rolls from coming into contact with one another.
  • the present invention makes use of a sensor for monitoring the size or thickness of the bank in the form of a parallel beam of coherent radiation, preferably from a laser source which provides a contactless detection of the thickness of the bank of viscous materials and controls the regulators for the calendering operation to maintain an optimum bank thickness while preventing the rolls from coming into contact with one another.
  • the receiver disposedat the end of the roll assembly opposite thesource maybe a photodetector (photo-cell) and the nondivergent or columnated beam is preferably trained along the surface of the bank turned. away'from the rolling gap or nip and generally along a path parallel to the axis of the rolls.
  • the beam is either screened by the bank from the receiver so that no voltage output is derived or is permitted to reach the receiver without interruption by the bank (as in the case of an excessively small bank thickness) whereby a voltage signal is generated by the receiver.
  • the device for monitoring the thickness of the bank is so arranged on the roll support stands that the beam glances along thesurface of the bank in its optimum thickness. A signal is thus produced when the bank thicknessfalls below the optimum and no signal is produced when the bank thickness exceeds the optimum.
  • the signals generated by the receiver are applied to a controller which can increase or decrease the width of the nip or rolling gap and therefore the amount of material retained in the bank or drawn therefrom in accordance with whether the signal voltage is obtained or not, thereby maintaining a substantially constant thickness of the bank.
  • a controller which can increase or decrease the width of the nip or rolling gap and therefore the amount of material retained in the bank or drawn therefrom in accordance with whether the signal voltage is obtained or not, thereby maintaining a substantially constant thickness of the bank.
  • the rolls may be brought to a standstill or backed away from each other to prevent contact.
  • An acoustic signal or optical signal may. also be operated to alert responsive personnel.
  • the time interval can be determined by a time delay relay and the correction of the bank failure condition can be accomplished by modifying the thickness of the layer of viscous materials delivered to the calender rollers (e.g. by controlling the position of a stripper blade, by controlling the roll adjustment devices etc.).
  • a beam or columnar nondivergent coherent radiation has a significant advantage in that, because of its sharp delineation and high intensity, it is not materially affected by the plasticizer vapors which form in the region of the bank of viscous materials and practically is transparent to the monitoring beam. in other words, no error or substantial signal reduction results from the presence of the cloud of plasticizer vapor around the bank of viscous material when a laser source is applied.
  • the high-frequency angular oscillation thus causes the beam to sweep across the length of this sensitive zone and, when the latter comprises a plurality of photocells connected in parallel, generates a pulse train of constant frequency and amplitude provided that the beam is not intercepted by the bank of viscous material.
  • this output pulse train is integrated over each sweep to and fro across the sensitive zone, the resulting pulses have a duration and, consequently, an average voltage level which is inversely proportional to the thickness of the bank. in fact, the loss of signal from the unobstructed-path condition is a precise measurement of the thickness of the bank.
  • the resulting signal which continuously varies in accordance with the thickness of the bank, increases the information available for the process controller, facilitates a rapid response to deviations of the bank thickness from its set point value and provides, if desired, a
  • the material feed to the roll gap can be increased by adjusting the spacing of the stripper blade arrangement of a roll mill ahead of the calendering roll, may vary the gap width of the calendering rolls, or may otherwise modify the rate at which material is fed to the bank and through the calender gap to maintain the-optimum bank thickness.
  • the circuitry associated with the system should be designed so that the system has two signal conditions to which thecontroller responds, namely, an output condition in which a voltage is generated of a suff cient level to operate the controller and indicates a failure or diminution of the bank and a no-output condition in which the bank is of satisfactory width.
  • the beam When the beam is reciprocated parallel to itself in a plane perpendicular to the plane of the axes through the calendering rolls, it is possible to provide a system in which the output voltage is not excessively dependent upon the thickness of the bank and it is also possible to avoid excessive spacing between the beam and the gap.'Each change in the thickness of the bank produces an output which is thus independent of the distance of the monitoring beam from the rolls at the instant the output is generated.
  • the parallel reciprocation of the beam has also the advantage that a change in the set-point value of the bank thickness does not require a mechanical shifting of the laser source or detector, it being merely necessary to introduce an altered set-point signal into the circuitry which can include a comparator.
  • the oscillation of the beam can be carried out by angularly displacing the laser source about an axis parallel to the plane of the axes of the rolls or by reflecting the beam from the source with an oscillatable mirror.
  • the angular oscillation of the beam may be effected by a rotary polygonal mirror arrangement, a rotary prism or other beam-deflecting means.
  • the parallel reciprocation may make use of an actual mechanical displacement of the source although it also may employ a shiftable' beam deflector, e.g. an angularly displaceable radiation-transparent refractive plate having parallel optical surfaces.
  • the oscillation frequency is so selected that it exceeds the possible frequency of alteration of the bank thickness although a lower frequency may be also used, it being merely necessary to provide a substantial difference between the oscillation frequency and the fre quency at which the bank thickness varies.
  • FIG. 1 is a partial perspective view, in diagrammatic form with parts broken away, of a vertical calendering roll apparatus provided with a system for monitoring .bank thickness according to the invention
  • FIG. 2 is a diagrammatic perspective view of a system for angularly oscillating the monitoring beam in accordance with an embodiment of the invention
  • FIG. 3 is a view similar to FIG. 2 of an embodiment for the high-frequency parallel reciprocation of the beam
  • FIG. 4 is a view similar to FIG. 2 of an embodiment in which other means is employed to achieve parallel reciprocation of the beam;
  • FIG. 5 is a view similar to FIG. 1 showing the gapmonitoring means
  • FIG. 6 is a block circuit diagram illustrating another feature of the invention.
  • the set-point input is shown, by way of example, to be a variable resistor 2b in FIG. 6.
  • the controller 7 for the calendering process may have a number of outputs including an output 7a for regulating roll speed, an output 7b for adjusting the roll position, an output 7c for controlling the roll-bending device, an output 7d for operating the stripper plate of the millfeeding the viscous material to the calender apparatus andan output 7e constituting an acoustic or optical alarm.
  • the coherent radiation source also comprises, as illustrated in FIG. 1, a drive 8 for angularly oscillating the beams 5 through an anglea at a high frequency, e.g. of the order of kHz whereby the oscillating plane is perpendicular to the plane of the axes of the rolls.
  • a drive 8 for angularly oscillating the beams 5 through an anglea at a high frequency e.g. of the order of kHz whereby the oscillating plane is perpendicular to the plane of the axes of the rolls.
  • the beam thus sweeps across the sensitive zone 6 and is of band-like configuration.
  • the detector 2 includes an integrator, the system generates a pulse train of constant frequency having a mean voltage output. This differs from the .case in which the beam either impinges upon the receiver or is obstructed, whereby the output values are either zero or the maximum amplitude.
  • the mean output of the system illustrated in FIGS. 1 and 6, varies between zero with an excessively thick bank and a maximum corresponding to disappearance of the bank.
  • the set-point value corresponds to an average voltage level. Since the zone at which the beam encounters the receiver is substantially a point, the travel of this point can be used to generate a pulse train whose pulse duration is inversely proportional to the bank thickness.
  • the laser may be fixed and optical means can be employed for imparting the oscillation to the beam.
  • the optical means is a .mirror 9 driven by an oscillating motor whose pumping circuitry and associated apparatus has not been illustrated, is mounted upon the other roll support not illustrated) while a photocell arrangement 2, constituting the detector, is carried by the roll-' journaling structure represented at 3.
  • the beam of coherent radiation shown at 5, is trained along the surface of the bank 4 of viscous material turned away from the rolling gap.
  • the sharply columnated beam 5 from the radiation source 1 is trained upon the elongated sensitivity zone 6 of the detector 2, the sensitivity zone lying generally in a plane perpendicular to the plane of the axes of the roll 53 and 54, between which the bank of viscous material feeds to form the synthetic-resin foil.
  • the detector 2 may comprise a plurality of photocells connected in parallel to a control circuit 7 as represented at 2a in FIG. 6.
  • the system 2 may also include an integrator from the output of the parallel-connected photocells 2a, a differentiator having the integrated signal as its input, and a comparator for comparing the detected bank thickness with a set-point value representabout an axis perpendicular to the plane of oscillation.
  • FIG. 3 shows a system in which the laser 1 is shifted to and fro with the beam parallel to itself bya crankdrive 10, a similar motion of the beam being obtained by the use of a transparent plate 11 having planar andparallel incident and radiation surfaces. The beam is refracted through the plate to an extent determined by the angle so that angular oscillation of the plate by a motor of the type described in-connection with element 8 in FIG. 1, will generate a planar sweep of the beam parallel to it self.
  • FIG. 5 there is shown the vertical calender arrangement of FIG. 1 with the bank monitor omitted to enable the positions of the gap-monitoring system to be seen with greater clarity.
  • This system comprises a pair of coherent radiation sources 12, e.g. lasers, mounted adjacent opposite ends of the rolls and projecting coherent beams 14 through the gap betweenthe rolls.
  • the cross-section of the beams 14' is so selected that during movement of the rolls together during starting Should the rolls approach too closely, controller 7 responds to terminate advance of the rolls.
  • the switch has a further contact 150 which connects the detector 2 with a-sw'itch operator l6 responding to the buildup of the bank to operate the switch and close the contacts 15d which applies the output of detector 2 to the controller 7 as already described.
  • the switch may also be operated by hand.
  • a calendering apparatus comprising at least two closely juxtaposed calendering rolls having a nip defining a gap between them and rotatable to produce a band from viscous material forming a bank thereof ahead of said gap; and a device for monitoring the thickness of said bank in a plane substantially perpendicular to the plane of the axes of the rolls, said device comprising a coherent-radiation source projecting a collimated beam of radiation substantially along but adjacent to said gap and interceptable by said bank and a detector disposed opposite said source and responsive to variations in a radiation in a plane substantially perpendicular to the plane of the axes of the rolls for producing an output representing the condition of said bank.
  • said source is a laser disposed at one end of said rolls and said detector includes photocell means disposed at the opposite ends of said rolls along said gap whereby said beam extends substantially parallel to the axes of said rolls along the surface of said bank away from said gap.
  • said detector having an elongated sensitive zone lying in said plane of oscillation.
  • said means for reciprocating said beam includes a radiationtransparent plate having planar mutually parallel incident and refraction surfaces.
  • said gapmonitoring means includes a source of coherent radiation at each end of said rolls training respective beams through said gap and respective photocells arrnagements intercepting the last-mentioned beams on the opposite sides of said gap.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
US00278438A 1971-08-20 1972-08-07 Calender roll apparatus with device for controlling the thickness of the bank of material in front of the rolling gap Expired - Lifetime US3809907A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2141741A DE2141741C3 (de) 1971-08-20 1971-08-20 Vorrichtung zum Erfassen der Dicke des Knets am Walzenspalt von Kalanderwalzen

Publications (1)

Publication Number Publication Date
US3809907A true US3809907A (en) 1974-05-07

Family

ID=5817278

Family Applications (1)

Application Number Title Priority Date Filing Date
US00278438A Expired - Lifetime US3809907A (en) 1971-08-20 1972-08-07 Calender roll apparatus with device for controlling the thickness of the bank of material in front of the rolling gap

Country Status (12)

Country Link
US (1) US3809907A (de)
JP (1) JPS5436613B2 (de)
AT (1) AT333049B (de)
BE (1) BE787664A (de)
CA (1) CA980892A (de)
CH (1) CH544642A (de)
DD (1) DD101599A5 (de)
DE (1) DE2141741C3 (de)
FR (1) FR2150359B1 (de)
GB (1) GB1398640A (de)
IT (1) IT962144B (de)
NL (1) NL7211237A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912193A (en) * 1973-06-21 1975-10-14 Knox Inc Web position detector apparatus
US4182259A (en) * 1978-10-04 1980-01-08 The Dow Chemical Company Apparatus for measuring coating thickness on an applicator roll
US5206703A (en) * 1989-08-25 1993-04-27 Renold Power Transmission Ltd. Method of and apparatus for measuring small gaps
DE4428812A1 (de) * 1994-04-08 1995-10-12 Reifenhaeuser Masch Anlage für das Walzen einer stranggepreßten Kunststoffbahn
US6159412A (en) * 1996-09-11 2000-12-12 Dupont Canada Inc. Method for manufacture of liquid crystalline polymer films
US6330024B1 (en) 1996-09-05 2001-12-11 The Goodyear Tire & Rubber Company System and method for controlling the size of material banks in calenders, mills, and feed mills
US20020070478A1 (en) * 1999-10-21 2002-06-13 Welex Incorporated Apparatus and method for measuring and of controlling the gap between polymer sheet cooling rolls
US6406285B1 (en) * 1999-10-21 2002-06-18 Welex Incorporated Apparatus for measuring and of controlling the gap between polymer sheet cooling rolls
US6644645B2 (en) 2002-01-10 2003-11-11 Gbr Systems Corporation Stack control mechanism
WO2005065022A3 (en) * 2004-01-11 2006-02-16 Quality By Vision Ltd Optical apparatus for measuring tooling position within a seaming machine
CN104827765A (zh) * 2015-05-15 2015-08-12 合肥京东方光电科技有限公司 一种印刷机及控制方法
US20170184510A1 (en) * 2013-04-26 2017-06-29 Shenzhen China Star Optoelectronics Technology Co., Ltd. Particulate matter detection apparatus
US10259148B2 (en) * 2015-06-11 2019-04-16 Toyo Tire Corporation Apparatus and method for manufacturing rubber sheet

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228918A (en) * 1975-08-29 1977-03-04 Taisei Corp Process for detecting residual explosive in an explosion work
EP0080309A3 (de) * 1981-11-16 1984-02-29 De La Rue Systems Limited Apparat zum Analysieren von Blättern
DE3909496C3 (de) * 1989-03-22 1994-07-14 Troester Maschf Paul Extruder-Kalander-Kombination
GB2243573B (en) * 1990-04-27 1993-10-27 Reifenhaeuser Masch Process for producing plastics foil
JP2871565B2 (ja) * 1995-12-26 1999-03-17 株式会社神戸製鋼所 ローラヘッド押出機とその制御方法
KR101493203B1 (ko) 2008-02-20 2015-02-13 가부시키가이샤 네지로 양나사체 및 암나사체
DE102013101015A1 (de) * 2013-02-01 2014-08-07 TRüTZSCHLER GMBH & CO. KG Walzwerk für Faserbänder und Vorrichtung zur Überwachung eines Walzwerkes für Faserbänder

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3016464A (en) * 1959-06-10 1962-01-09 Daystrom Inc Apparatus for determining the location and thickness of a reflecting object
US3037156A (en) * 1958-09-24 1962-05-29 Genevoise Instr Physique Control device for the setting in exact postition of a movable member
US3518441A (en) * 1968-01-24 1970-06-30 Neotec Corp Optical gage for measuring the thickness of a continuous web
US3588513A (en) * 1968-04-08 1971-06-28 Omron Tateisi Electronics Co Method and apparatus for photoelectric inspection of sheet materials
US3600591A (en) * 1970-01-13 1971-08-17 Feldmuehle Ag Apparatus for detecting surface elevations on a moving sheet
US3659950A (en) * 1969-07-14 1972-05-02 Iris Corp Laser apparatus for detecting the size and form of filamentary material by measuring diffracted light

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037156A (en) * 1958-09-24 1962-05-29 Genevoise Instr Physique Control device for the setting in exact postition of a movable member
US3016464A (en) * 1959-06-10 1962-01-09 Daystrom Inc Apparatus for determining the location and thickness of a reflecting object
US3518441A (en) * 1968-01-24 1970-06-30 Neotec Corp Optical gage for measuring the thickness of a continuous web
US3588513A (en) * 1968-04-08 1971-06-28 Omron Tateisi Electronics Co Method and apparatus for photoelectric inspection of sheet materials
US3659950A (en) * 1969-07-14 1972-05-02 Iris Corp Laser apparatus for detecting the size and form of filamentary material by measuring diffracted light
US3600591A (en) * 1970-01-13 1971-08-17 Feldmuehle Ag Apparatus for detecting surface elevations on a moving sheet

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912193A (en) * 1973-06-21 1975-10-14 Knox Inc Web position detector apparatus
US4182259A (en) * 1978-10-04 1980-01-08 The Dow Chemical Company Apparatus for measuring coating thickness on an applicator roll
US5206703A (en) * 1989-08-25 1993-04-27 Renold Power Transmission Ltd. Method of and apparatus for measuring small gaps
DE4428812A1 (de) * 1994-04-08 1995-10-12 Reifenhaeuser Masch Anlage für das Walzen einer stranggepreßten Kunststoffbahn
US6330024B1 (en) 1996-09-05 2001-12-11 The Goodyear Tire & Rubber Company System and method for controlling the size of material banks in calenders, mills, and feed mills
US6159412A (en) * 1996-09-11 2000-12-12 Dupont Canada Inc. Method for manufacture of liquid crystalline polymer films
US7172720B2 (en) 1999-10-21 2007-02-06 Welex Incorporated Apparatus and method for measuring and of controlling the gap between polymer sheet cooling rolls
US20020070478A1 (en) * 1999-10-21 2002-06-13 Welex Incorporated Apparatus and method for measuring and of controlling the gap between polymer sheet cooling rolls
US6406285B1 (en) * 1999-10-21 2002-06-18 Welex Incorporated Apparatus for measuring and of controlling the gap between polymer sheet cooling rolls
US6863517B2 (en) 1999-10-21 2005-03-08 Welex Incorporated Apparatus and method for measuring and of controlling the gap between polymer sheet cooling rolls
US6644645B2 (en) 2002-01-10 2003-11-11 Gbr Systems Corporation Stack control mechanism
WO2005065022A3 (en) * 2004-01-11 2006-02-16 Quality By Vision Ltd Optical apparatus for measuring tooling position within a seaming machine
US20170184510A1 (en) * 2013-04-26 2017-06-29 Shenzhen China Star Optoelectronics Technology Co., Ltd. Particulate matter detection apparatus
US9880104B2 (en) * 2013-04-26 2018-01-30 Shenzhen China Star Optoelectronics Technology Co., Ltd Particulate matter detection apparatus
CN104827765A (zh) * 2015-05-15 2015-08-12 合肥京东方光电科技有限公司 一种印刷机及控制方法
CN104827765B (zh) * 2015-05-15 2017-12-29 合肥京东方光电科技有限公司 一种印刷机及控制方法
US10259148B2 (en) * 2015-06-11 2019-04-16 Toyo Tire Corporation Apparatus and method for manufacturing rubber sheet

Also Published As

Publication number Publication date
GB1398640A (en) 1975-06-25
CH544642A (de) 1973-11-30
DE2141741C3 (de) 1980-04-03
IT962144B (it) 1973-12-20
FR2150359A1 (de) 1973-04-06
JPS4830758A (de) 1973-04-23
DE2141741B2 (de) 1979-08-16
FR2150359B1 (de) 1976-08-13
NL7211237A (de) 1973-02-22
DD101599A5 (de) 1973-11-12
DE2141741A1 (de) 1973-02-22
BE787664A (fr) 1972-12-18
AT333049B (de) 1976-10-25
JPS5436613B2 (de) 1979-11-10
ATA678472A (de) 1976-02-15
CA980892A (en) 1975-12-30

Similar Documents

Publication Publication Date Title
US3809907A (en) Calender roll apparatus with device for controlling the thickness of the bank of material in front of the rolling gap
EP0429161B2 (de) Walzenknetstärke-Überwachungsverfahren und -vorrichtung, Folienherstellungsverfahren und -vorrichtung und Folientemperaturmessverfahren und -vorrichtung
US3531827A (en) Thickness control system for calendering
US3974248A (en) Profile determining and/or controlling system
EP0485691B1 (de) Vorrichtung zum synchronisierten Schneiden
US4501642A (en) Method of paper tension control to maintain flutter within a predetermined range
EP0037669B1 (de) System zum Detektieren eines Bahnbruchs
DE2335116A1 (de) Verfahren und vorrichtung zur messung der augenstellung
EP0560142B1 (de) Verfahren und System zur Regelung der Walzspalte eines Kalanders
EP2341313B1 (de) Abtasteinrichtung
US4000402A (en) Scanning gauge control for sheet processing apparatus
US5110277A (en) Dough-stretching roller apparatus
DE3880821T2 (de) Geschwindigkeitsmesser fuer papierbahnen in einer druckerpresse.
US3858983A (en) Shaped product measurement
US5262101A (en) Bank quantity monitoring method and apparatus, sheet forming method and apparatus, and sheet temperature measuring method and apparatus
FI75052B (fi) Straolningsbaserat granskningssystem foer en materialframstaellningsanordning samt metod som anvaender bestraolningsmaetare.
US3557351A (en) Property measurement signal filtering method and apparatus for eliminating predetermined components
US4386273A (en) Positioner and slitter for laminar material
US5094790A (en) Method of an apparatus for producing a web of platelike thermoplastic
US3592371A (en) Band width controller
US4878522A (en) Paste hopper control system
US3847730A (en) Peak responsive control system and method
US4087499A (en) Method for controlling uniformity in tire tread stock
GB1417056A (en) Apparatus for controlling the bead height in the roll gap of a calender to which material to be calendered is fed from a pre-plastifying machine
SE461708B (sv) Anordning foer belaeggning av en loepande pappersbana paa baada sidor

Legal Events

Date Code Title Description
AS Assignment

Owner name: BKMI INDUSTRIEANLAGEN GMBH, SAPPOROBOGEN 6-8, D-80

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KRAUSS-MAFFEI AKTIENGESELLSCHAFT;REEL/FRAME:003852/0759

Effective date: 19810428