US3464610A - Fan-folded paper stacker - Google Patents

Fan-folded paper stacker Download PDF

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Publication number
US3464610A
US3464610A US595154A US3464610DA US3464610A US 3464610 A US3464610 A US 3464610A US 595154 A US595154 A US 595154A US 3464610D A US3464610D A US 3464610DA US 3464610 A US3464610 A US 3464610A
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US
United States
Prior art keywords
paper
web
tractors
chamber
buffer
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
US595154A
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English (en)
Inventor
Menno G Koning
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.)
Momentum Systems Corp
Mohawk Systems Corp
Original Assignee
Mohawk Data Sciences Corp
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Publication date
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Publication of US3464610A publication Critical patent/US3464610A/en
Assigned to MOHAWK SYSTEMS CORPORATION, A DE CORP reassignment MOHAWK SYSTEMS CORPORATION, A DE CORP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MOHAWK DATA SCIENCES CORP., A NY CORP
Assigned to MOMENTUM SYSTEMS CORPORATION reassignment MOMENTUM SYSTEMS CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: MOHAWK SYSTEMS CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/02—Folding limp material without application of pressure to define or form crease lines
    • B65H45/06—Folding webs
    • B65H45/10—Folding webs transversely
    • B65H45/101—Folding webs transversely in combination with laying, i.e. forming a zig-zag pile
    • B65H45/1015—Folding webs provided with predefined fold lines; Refolding prefolded webs, e.g. fanfolded continuous forms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/58—Supply holders for sheets or fan-folded webs, e.g. shelves, tables, scrolls, pile holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/042—Sensing the length of a web loop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2408/00—Specific machines
    • B65H2408/20—Specific machines for handling web(s)
    • B65H2408/21—Accumulators
    • B65H2408/215—Accumulators supported by vacuum or blown air

Definitions

  • a high speed stacker for a fan-folded, perforated web includes a pair of oscillating feed tractors having a frequency of oscillations dependent on the speed of stacking and the distance between folds.
  • the tractors pull the web from a vacuum-column buffering chamber which receives the web from a supply source such as a line printer.
  • the web feed path from the buffer to the stacker includes an air bearing which is pressurized with air from the vacuum chamber.
  • This invention relates to Web folding devices and, in particular, to devices adapted to restack fan-folded paper of the type that is conventionally used with printers in data processing and other systems.
  • Modern printers for data processing and communications applications often employ fan-folded paper which generally consists of several layers of paper interspersed with carbon paper. After printing, it is convenient to restack the paper by refolding it along the existing fold lines. For slow-speed, continuous operation, the paper can often be refolded solely under the influence of gravity as it drops from the printer onto a stack.
  • highspeed or intermittent operation of the printer may result in improper stacking due to air resistance and other effects.
  • Prior attempts to rapidly restack paper at high and intermittent speeds have met with success by the use of oscillating guide bars and other mechanisms, but even with these devices, the paper sometimes wrinkles or crumples behind the guide bars due to friction between the guide bars and the paper. Generally, the slightest wrinkle or any other deviation in the pattern of the stacking paper is immediately compounded, resulting in paper being spewed out of the printer in chaotic fashion and requiring the operator to stop the printer and hand fold the unstac-ked paper.
  • the paper feed mechanism contains two sprocketed tractors which engage holes along the edge of the paper, and the oscillating action is accomplished by rocking the output ends of the tractors.
  • the tractors are rocked in synchro- Patented Sept. 2, 1969 nism with the advance of paper, each complete oscillation corresponding to two sheets (folds) of paper.
  • the rocking cycle is variable to accommodate various sheet lengths.
  • a stacking platform is adjustably located below the oscillating tractors to collect the stacking paper.
  • a buffer chamber is adapted to hold a loop of slack paper and photodetector mechanisms are employed to sense the amount of paper in the buffer chamber and appropriately control the advancing of paper from the buffer to the stacker.
  • air is removed from the bottom of the buffer chamber to lower the air pressure below the loop of slack paper, thereby drawing paper into the buffer as paper is fed from the printer.
  • the chamber is rectangular in shape with dimensions such that the loop of slack paper substantially blocks the flow of air into the chamber, maintaining reduced pressure below the loop of slack.
  • Another feature is the use of an air bearing between the buffer and the stacker. Pressurized air is forced through holes around a curved surface to maintain the paper at a relatively fixed distance away from contact with surface.
  • a single air flow mechanism (such as a fan) provides both the reduced pressure for the buffer and the increased pressure for the air bearing.
  • FIGURE 1 is an isometric view of the preferred embodiment of the paper stacker, including the buffer and air bearing.
  • FIGURE 2 is a schematic diagram that illustrates the operation of the mechanism shown in FIGURE 1.
  • FIGURE 3 is a detailed drawing showing the operation of the paper feed mechanisms, including both the paper advancing and rocking features.
  • a web of paper 2 to be stacked enters from the rear to form a loop of slack in a buffer chamber 4. Air is drawn from the bottom of the chamber to cause the supplied paper to enter the chamber.
  • a pair of paper feed tractors 6 engage spaced holes 8 along the edges of the paper to advance the paper in the downward direction toward a stacking platform 10.
  • the platform is adjustable in height and lowered by the operator or by automatic means as the stack of paper rises.
  • the paper engaging tractors 6 not only advance the paper, but also impart a forward and backward rocking or oscillating motion to coerce folding along fold lines 12.
  • the distance between fold lines 12 determines the relationship between the speed of advance of the paper and the frequency of oscillation (rocking) of the tractors. This is adjusted with a control 14 by the machine operator.
  • the paper moves between the buffer 4 and the tractor 6 over an air bearing 16 which is a generally semicircular sheet of material having air holes (not shown) around its surface.
  • the air that is evacuated from the bottom of the buifer 4 is supplied under pressure to the holes in the air bearing to maintain the paper away from the bearing surface, hence reducing friction.
  • FIGURE 2 The operation of the mechanism is more clearly demonstrated in FIGURE 2 where dimensions are somewhat exaggerated to facilitate their description.
  • the web of paper 2 enters the buffer chamber 4 under the influence of reduced air pressure which is present in the lower region of the butter due to the action of an air flow mechanism 18, such as a fan or blower.
  • the bottom surface 20 of the bulfer contains holes to permit evacuation of air.
  • the end walls of the buffer are not shown in FIGURE 2, but are separated from each other by a distance that is slightly greater than the width of the paper to minimize air flow into the lower region of the buffer. However, it has been found that satisfactory operation is achieved even when there is significant space at the edges of the paper.
  • the paper 2 is pulled from the buffer 4 and past the air bearing 16 by engaging tractors 6 which advance the paper toward the stacking platform 10. Pressure to the air bearing is supplied by the same air flow device 18 which develops the reduced pressure in the buffer.
  • the engaging tractors 6 contain sprockets 22 arranged around an endless belt which is driven to advance the paper. While the tractors are being driven, their lower ends are alternately rocked to either side of the vertical direction to the positions shown by phantom lines 24. The tractors are advanced and rocked by a tractor control mechanism 26 under the influence of signals from an optical device 28.
  • the optical device 28 transmits light against two slanted mirrors 30 toward two reflectors 32.
  • the lights reflected by reflectors 32 is transmitted via mirrors 30 back toward photodetectors in the optical device 28.
  • the photodetectors supply signals to the tractor control mechanism 26.
  • the loop of slack paper in the buffer 4 exceeds a first predetermined amount, the upper light path is blocked, as shown.
  • a further increase in the size of the loop of slack paper causes the lower light path to also be blocked.
  • a two-speed tractor control mechanism is employed, where the tractors are activated at low speed as the loop of slack paper drops below the upper light path in the buffer and are activated at high speed when the loop falls below the lower light path.
  • the tractors 6 are activated at high speed the loop decreases in size (because in high speed operation the tractors advance paper faster than the paper can be supplied to the butter).
  • the tractors can be switched to low speed operation again but, in the preferred embodiment of the invention, high speed operation is continued until the loop is above the upper light path, at which time the tractors are stopped.
  • optical device 28 and the tractor control device 26 are not described in greater detail because opticallycontrolled drive mechanisms of thetype illustrated are well known in many applications.
  • the engaging tractors and their control mechanism are shown in detail in FIGURE 3.
  • the paper 2 contains spaced holes 8 along its edges.
  • the tractors 6 are of wellknown design consisting of an endless chain 34, the links of which support sprockets 22 which engage the holes 8 to cause the paper to advance when the chain is driven.
  • a paper clamp 36 holds the edge of the paper against the sprockets. The clamp is arranged so that it can be swung out of position to insert or remove the paper.
  • a spring 38 provides for positive positioning of clamp 36.
  • a motor (not shown) operates at the desired speed, driving a shaft 40 (FIGURE 3).
  • This motion is transmitted by gear wheel 42 to a gear wheel 44 to provide motion to the chain 34.
  • the gear wheel 44 is supported on a shaft 62 by hearings to permit independent motion of the gear wheel.
  • the motion of shaft 40 is also transmitted through several gear wheels 46, 48 and 50 to a selected gear wheel 52.
  • Gear wheels 48 and 50 are mounted on a support 54 which is adjustable to permit gear wheel 50 to coact with the gear wheel 52 corresponding to the distance between paper folds.
  • the selection of gear wheel 52 is determined by the setting of control 14 (FIGURES 1 and 3).
  • gear wheel 52 is transmitted by a crank 56 to an arm 58 to rock another arm 60.
  • This rocking motion is transmitted by a shaft 62 to an arm 61 which causes the lower end of the tractor to rock and, hence, effect stacking of the paper along the fold lines.
  • the tractors are rocked in a cycle which depends upon the speed of advance of the tractors and the selected gear wheel 52 to cause the paper to fold at times corresponding to the fold lines.
  • the tractor assembly is initially set to an appropriate position by an operator. This adjustment is only necessary when a web of paper is first entered into the stacker.
  • a web feeding device having web advancing means and a Web slack buffer, .characterized by a bulfer comprising a downwardly-recessed, rectangular chamber and airflow means for withdrawing air from the bottom of the chamber, the dimensions of the chamber being arranged so that a loop of slack web in the chamber substantially blocks the path of air flow into the chamber to reduce the air pressure below the loop of slack web, the web advancing means being separated from the butter by an air bearing, said airflow means including a closed conduit for directing the air withdrawn from the chamber to said bearing to pressurize said bearing.
  • a web feeding device having web advancing means and a web slack buffer, the latter including a downwardly recessed, rectangular chamber and airflow means for withdrawing air from the bottom of the chamber, the dimensions of the chamber being arranged so that a loop of slack web in the chamber substantially blocks the path of air flow into the chamber to reduce the air pressure below the loop of slack web, the combination comprising:
  • control means responsive to said detecting means for controlling said actuating means (1) to advance said web at said high speed when the level of said web changes in a first direction to a level outside said normal range, (2) to disable said advancing means when the level of said web changes in a second direction, opposite said first direction, to a level outside said normal range; and (3) to advance said web at said low speed when the level of said web changes in said first direction to a level Within said normal range.
  • said web advancing means pulls the web out of the buffer to reduce the amount of web slack therein, thereby raising said web level;
  • control means operates to cause high speed web advance when said web drops to a level below said lower level.
  • first and second light beams traversing said chamber at said upper and lower levels
  • photosensitive means for detecting the presence and absence of said beams.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Advancing Webs (AREA)
US595154A 1966-11-17 1966-11-17 Fan-folded paper stacker Expired - Lifetime US3464610A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US59515466A 1966-11-17 1966-11-17

Publications (1)

Publication Number Publication Date
US3464610A true US3464610A (en) 1969-09-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
US595154A Expired - Lifetime US3464610A (en) 1966-11-17 1966-11-17 Fan-folded paper stacker

Country Status (4)

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US (1) US3464610A (enrdf_load_stackoverflow)
DE (1) DE1611339A1 (enrdf_load_stackoverflow)
FR (1) FR1549602A (enrdf_load_stackoverflow)
GB (1) GB1183088A (enrdf_load_stackoverflow)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2146038A1 (de) * 1971-09-15 1973-03-22 Frankenthal Ag Albert Vorrichtung zum transport von materialbahnen in druckmaschinen
US3756488A (en) * 1971-02-18 1973-09-04 Oce Van Der Grinten Nv Magazine for zigzag-folded photoconductive belt for indirect electrophotography
US3759506A (en) * 1970-05-20 1973-09-18 Boewe Boehler & Weber Kg Masch Device and method for forming an accordian pile from a continuous web, using an air current parallel to the web
US3829080A (en) * 1971-06-30 1974-08-13 Mohawk Data Sciences Corp Fan-folded paper stacker for high speed printer
US3927874A (en) * 1972-04-15 1975-12-23 Philips Corp Paper stacker
US3938437A (en) * 1974-02-27 1976-02-17 Harris-Intertype Corporation Variable speed unwind controller drum
US3998542A (en) * 1974-06-20 1976-12-21 Pitney-Bowes, Inc. Photoconductor storing apparatus for an electrostatic copier
DE2632130A1 (de) * 1975-07-17 1977-02-03 Dataproducts Corp Anordnung zur stapelung von zick- zack-gefaltetem bahnmaterial
US4030720A (en) * 1976-02-17 1977-06-21 Jones Gary E Paper stacker
DE3040765A1 (de) * 1980-10-29 1982-06-03 Georg Rudolf 8411 Zeitlarn Sillner Einrichtung zum maeanderfoermigen ablegen von baendern,gurten u.dgl.
EP0164067A1 (de) * 1984-06-02 1985-12-11 SÜKA Süddeutsche Spezialdruckerei Hermann Jung GmbH Zuführvorrichtung für Endlospapier zu einem Schnelldrucker
EP0164651A1 (de) * 1984-06-02 1985-12-18 SÜKA Süddeutsche Spezialdruckerei Hermann Jung GmbH Vorrichtung zum Abziehen einer Endlospapierbahn und zum Zuführen derselben in einen Schnelldrucker
US4622028A (en) * 1980-05-12 1986-11-11 Bunch Jr Ernest B Delivery mechanism for paper sheet processing apparatus
US4657164A (en) * 1984-08-10 1987-04-14 Jos. Hunkeler Ltd. Web tension controller
US4729812A (en) * 1985-02-06 1988-03-08 Luciano Meschi Service apparatus for machines using continuous strips of paper forms or sheets
US5092696A (en) * 1989-12-29 1992-03-03 Oce Graphics France S.A. Graphics printer including print medium guidance system
US5123893A (en) * 1991-04-01 1992-06-23 Hewlett-Packard Company Passive paper stacker
EP0500160A1 (en) * 1991-02-11 1992-08-26 Industria Grafica Meschi S.r.l. Loop control device for paper webs
WO2009013300A3 (de) * 2007-07-23 2009-06-04 Oce Printing Systems Gmbh Einrichtung für die zufuhr einer bedruckstoffbahn zu einer elektrografischen druckeinrichtung
WO2016011213A1 (en) 2014-07-18 2016-01-21 Illinois Tool Works Inc. Method and apparatus for producing a container carrier with a rotary die press
DE102007063763B3 (de) * 2007-07-23 2016-02-04 Océ Printing Systems GmbH & Co. KG Puffervorrichtungen für die Zufuhr einer Bedruckstoffbahn zu einer Druckeinrichtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5812185B2 (ja) * 1978-06-22 1983-03-07 富士電機株式会社 記録装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1348846A (en) * 1916-09-28 1920-08-10 Paper Service Co Sheet-interfolding machine
US1484069A (en) * 1920-10-11 1924-02-19 David W Hudson Interfolding machine
US2016539A (en) * 1931-08-01 1935-10-08 Carl W Brenn Folding machine
US2334283A (en) * 1942-09-04 1943-11-16 Egry Register Co Decollating machine
US2927789A (en) * 1958-01-02 1960-03-08 Ibm Storage and feed means for a continuous web
US3083008A (en) * 1960-09-30 1963-03-26 John L Miller Folding machine for tubular knitted fabrics
US3086768A (en) * 1960-11-16 1963-04-23 Uarco Inc Folder for a collator
US3177749A (en) * 1960-05-27 1965-04-13 Westinghouse Electric Corp Control for feeding, measuring, and cutting strip material
US3180549A (en) * 1958-06-19 1965-04-27 Bell Telephone Labor Inc Magnetic tape feed control apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1348846A (en) * 1916-09-28 1920-08-10 Paper Service Co Sheet-interfolding machine
US1484069A (en) * 1920-10-11 1924-02-19 David W Hudson Interfolding machine
US2016539A (en) * 1931-08-01 1935-10-08 Carl W Brenn Folding machine
US2334283A (en) * 1942-09-04 1943-11-16 Egry Register Co Decollating machine
US2927789A (en) * 1958-01-02 1960-03-08 Ibm Storage and feed means for a continuous web
US3180549A (en) * 1958-06-19 1965-04-27 Bell Telephone Labor Inc Magnetic tape feed control apparatus
US3177749A (en) * 1960-05-27 1965-04-13 Westinghouse Electric Corp Control for feeding, measuring, and cutting strip material
US3083008A (en) * 1960-09-30 1963-03-26 John L Miller Folding machine for tubular knitted fabrics
US3086768A (en) * 1960-11-16 1963-04-23 Uarco Inc Folder for a collator

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759506A (en) * 1970-05-20 1973-09-18 Boewe Boehler & Weber Kg Masch Device and method for forming an accordian pile from a continuous web, using an air current parallel to the web
US3756488A (en) * 1971-02-18 1973-09-04 Oce Van Der Grinten Nv Magazine for zigzag-folded photoconductive belt for indirect electrophotography
US3829080A (en) * 1971-06-30 1974-08-13 Mohawk Data Sciences Corp Fan-folded paper stacker for high speed printer
DE2146038A1 (de) * 1971-09-15 1973-03-22 Frankenthal Ag Albert Vorrichtung zum transport von materialbahnen in druckmaschinen
US3927874A (en) * 1972-04-15 1975-12-23 Philips Corp Paper stacker
US3938437A (en) * 1974-02-27 1976-02-17 Harris-Intertype Corporation Variable speed unwind controller drum
US3998542A (en) * 1974-06-20 1976-12-21 Pitney-Bowes, Inc. Photoconductor storing apparatus for an electrostatic copier
DE2632130A1 (de) * 1975-07-17 1977-02-03 Dataproducts Corp Anordnung zur stapelung von zick- zack-gefaltetem bahnmaterial
US4054283A (en) * 1975-07-17 1977-10-18 Data Products Corporation Fan fold form stacker
US4030720A (en) * 1976-02-17 1977-06-21 Jones Gary E Paper stacker
US4622028A (en) * 1980-05-12 1986-11-11 Bunch Jr Ernest B Delivery mechanism for paper sheet processing apparatus
DE3040765A1 (de) * 1980-10-29 1982-06-03 Georg Rudolf 8411 Zeitlarn Sillner Einrichtung zum maeanderfoermigen ablegen von baendern,gurten u.dgl.
EP0164651A1 (de) * 1984-06-02 1985-12-18 SÜKA Süddeutsche Spezialdruckerei Hermann Jung GmbH Vorrichtung zum Abziehen einer Endlospapierbahn und zum Zuführen derselben in einen Schnelldrucker
EP0164067A1 (de) * 1984-06-02 1985-12-11 SÜKA Süddeutsche Spezialdruckerei Hermann Jung GmbH Zuführvorrichtung für Endlospapier zu einem Schnelldrucker
US4779783A (en) * 1984-06-02 1988-10-25 Suka Suddeutsche Spezialkdruckerei Hermann Jung Gmbh Device for removing an endless paper web and introducing same into a fast printer
US4657164A (en) * 1984-08-10 1987-04-14 Jos. Hunkeler Ltd. Web tension controller
US4729812A (en) * 1985-02-06 1988-03-08 Luciano Meschi Service apparatus for machines using continuous strips of paper forms or sheets
US5092696A (en) * 1989-12-29 1992-03-03 Oce Graphics France S.A. Graphics printer including print medium guidance system
EP0500160A1 (en) * 1991-02-11 1992-08-26 Industria Grafica Meschi S.r.l. Loop control device for paper webs
US5123893A (en) * 1991-04-01 1992-06-23 Hewlett-Packard Company Passive paper stacker
WO2009013300A3 (de) * 2007-07-23 2009-06-04 Oce Printing Systems Gmbh Einrichtung für die zufuhr einer bedruckstoffbahn zu einer elektrografischen druckeinrichtung
US20100202818A1 (en) * 2007-07-23 2010-08-12 Oce Printing Systems Gmbh Device for feeding a printing-material web to an electrographic printing device
DE102007034246B4 (de) * 2007-07-23 2010-10-28 OCé PRINTING SYSTEMS GMBH Einrichtung mit einer Vorzentriervorrichtung und einer Puffervorrichtung für die Zufuhr einer Bedruckstoffbahn zu einer Druckeinrichtung
US8523034B2 (en) 2007-07-23 2013-09-03 OCé PRINTING SYSTEMS GMBH Device for feeding a printing-material web to an electrographic printing device
DE102007063763B3 (de) * 2007-07-23 2016-02-04 Océ Printing Systems GmbH & Co. KG Puffervorrichtungen für die Zufuhr einer Bedruckstoffbahn zu einer Druckeinrichtung
WO2016011213A1 (en) 2014-07-18 2016-01-21 Illinois Tool Works Inc. Method and apparatus for producing a container carrier with a rotary die press
EP3169493A1 (en) * 2014-07-18 2017-05-24 Illinois Tool Works Inc. Method and apparatus for producing a container carrier with a rotary die press

Also Published As

Publication number Publication date
DE1611339A1 (de) 1970-12-10
GB1183088A (en) 1970-03-04
FR1549602A (enrdf_load_stackoverflow) 1968-12-13

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AS Assignment

Owner name: MOHAWK SYSTEMS CORPORATION, A DE CORP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MOHAWK DATA SCIENCES CORP., A NY CORP;REEL/FRAME:004596/0913

Effective date: 19860502

Owner name: MOMENTUM SYSTEMS CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:MOHAWK SYSTEMS CORPORATION;REEL/FRAME:004596/0879

Effective date: 19860502