US3637983A - Drier for sheet material - Google Patents

Drier for sheet material Download PDF

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US3637983A
US3637983A US41785A US3637983DA US3637983A US 3637983 A US3637983 A US 3637983A US 41785 A US41785 A US 41785A US 3637983D A US3637983D A US 3637983DA US 3637983 A US3637983 A US 3637983A
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housing
heater
drier
elongated
hood
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US41785A
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Victor R Nelson
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun

Definitions

  • An elongated suction hood has an open side adapted to face continuously moving sheet material to be dried by one or more elongated electrical heaters disposed in the hood.
  • An elongated combination reflector and shield is mounted in the hood for rotational adjustment about each heater between a reflecting position on the side of the heater opposite the open side of the hood and a shielding position interposed between the heater and open side of the hood.
  • This invention relates to driers, and more particularly to a drier for drying sheet stock during continuous passage through processing apparatus.
  • Driers of the class described heretofore have provided control against burning or damage of web stock by mechanism which moves the entire heater assembly away from the web stock. Because of the size and weight of such driers, the power requirement for their movement is considerable; the movement necessarily is sufficiently slow to prevent damage to the driers; and the space required to accommodate such driers and their movement necessarily limits the types of equipment with which such driers may be used.
  • the drier of this invention utilizes a combination reflector and shield mounted on an elongated fixed housing for movement about an elongated heater between heat-reflecting and heat-shielding positions relative to sheet It is by virtue of the foregoing basic concept that the principal objective of this invention is achieved; namely, to overcome the aforementioned disadvantages of prior driers.
  • Another important object of this invention is the provision of a drier of the class described which is of simplified construction for economical manufacture, maintenance and repair.
  • FIG. 3 is a diagrammatic elevation showing the drier of this invention in operative association with continuously moving sheet stock and illustrating means for controlling the drier by said moving sheet stock.
  • the drier illustrated in the drawing includes an elongated housing in the fonn of a suction hood.
  • the hood is'formed by bending sheet metal along lines to provide the angled back wall and spaced sidewalls 12.
  • the front of the hood is open and the ends are closed by end plates 14 secured to the back and sidewalls bysuch means as the screws 16.
  • the backwall preferably is lined internally with heat insulation material 18, such as sheet of Cerefelt secured to the inner surface of the backwall of adhesive or other suitable means.
  • Suction means is provided for withdrawing excessive heat from within the hood.
  • this means is provided by the hollow coupling 20.
  • the open inlet end of the coupling is provided by a peripheral flange 22 which was secured to the rear wall 10 of the hood by such means as the screws 24.
  • the inlet end of the coupling registers with correspondingly shaped openings in the rear wall and insulation material, as will be understood.
  • the coupling includes an outlet extension 26 which is adapted to be connected to a conduit leading to a vacuum pump or exhaust fan (not shown) by which to create a suction within the hood.
  • a pair of laterally spaced, elongated heaters 28 and 30 which extend in the longitudinal direction of the hood.
  • a single heater, or three or more heaters, may be associated with the housing, as will be understood.
  • the heaters may be of any conventional type, such as an electrical resistance element en closed in a rod, etc.
  • the heaters illustrated in the drawing are of that type, provided at their opposite ends with electrical terminals 32 for connection to a suitable source of electrical potential.
  • the heaters extend outward of the hood at their opposite ends, through openings provided in the end plates 14 as explained hereinafter, and are supported adjacent their outer ends by apertured brackets 34 secured to the end plates 14 as by means of screws 36.
  • the brackets and hood are isolated electrically from terminals 32 by insulating washers 38.
  • each heater Associated with each heater is acombination reflector and shield member 40.
  • this member is in the form of an elongated strip of metal curved arcuately to semicircular cross-sectional shape. It is spaced from and extends along the length of the heater and is secured at each of its opposite ends, as by means of screws 42, to a flange 44 of a hollbw hub 46. The adjacent end of the heater extends freely through the hub, as shown.
  • Each hub is joumaled for rotation in a bearing 48 mounted in the associated end plate 14.
  • a gear 50 is secured, as by a press fit, to each hub between the bearing 48 and flange 44.
  • the gears 50 associated with the combination reflector and shield members 40 are interconnected through common drive gear 52 secured to the opposite'e nds of an elongated drive shaft 54 as by means of keys 56.
  • the opposite ends of the drive shaft are journaled in bearings 58 mounted in the end plates 14 of the hood.
  • gears 50 associated with the combination reflector and shield members 40 may be arranged for direct interengagement and that the drive gear 52 may be arranged to engage only one of the gears 50. Such an arrangement is convenient when three or more heater assemblies are used in a hood.
  • One end of the drive shaft 54 is provided with an axial bore which is exposed through the hollow bearing 58 to the outer side of the end plate 14. This bore is arranged to receive the output shaft 60 of a drive motor 62 mounted on the outer side of the end plate. Means such as key 64 interconnects the output shaft and drive shaft for simultaneous rotation.
  • the drive motor may be electric, hydraulic or pneumatic.
  • means is provided for controlling the driving of the motor to limit rotation of the gears 50 to 1 80 intervals.
  • combination reflector and shield members 40 may be rotated between the heat-reflecting position illustrated in FIG. 2, wherein they are positioned on the side of the heater elements 28 and 30 opposite-the open end of the housing, and a shielding position in which they are interposed between the electric supply source through'the electric switch 78.
  • switch may be of the type which includes a rotary member capable of connection through chain 82 to idler roll 70.
  • the switch is maintained open while the strip of paper is moved continuously at a predetermined rate of speed. However, the switch closes when the rotational speed of roll 70 is decreased below a predetermined value, either by slowdown or breakage of the paper P.
  • the drive motor 62 is activated to rotate the drive shaft 54 and gears 50 to move the combination reflector and shield members 40 quickly from the reflecting position illustrated in FIG. 2, to the shielding position previously described. In this manner the paper is shielded from damage by radiant energy from the heaters. The heat generated within the hood is carried away through the suction coupling 20.
  • each combination reflector and shield member 40 Although only one heater is shown in association with each combination reflector and shield member 40, it is to be understood that two or more heaters may be so associated, if desired.
  • the length of the drier housing and heater elements may be varied to accommodate association with various types of processing apparatus.
  • the cross-sectional dimension of the drier (FIG. 2) is minimized by the component arrangement illustrated. Since the housing is maintained in a fixed position relative to processing apparatus, the drier utilizes a minimum of space and therefore may be integrated into a wide variety of printing presses and other processing apparatus, without signifleant modification of the latter.
  • a drier comprising a. an elongated housing having an open side,
  • driven gear means mounted rotatably on the housing independently of the heater means and having a central opening freely receiving the heater means therethrough
  • g. means securing the combination reflector and shield means to the driven gear means for rotation therewith between a heat-reflecting position on the side of the heater means opposite the open side of the housing and a heat-shielding position interposed between the heater means and open side of the housing.
  • the drier of claim 1 including coupling means on the housing for communicating the interior of the latter with a source of suction.
  • the drier of claim 1 including drive gear means mounted rotatably on the housing and engaging the driven gear means, and rotary drive means on the housing engaging the drive gear means.
  • the heater means comprises a plurality of spaced elongated electric heaters
  • the driven gear means comprises a plurality of driven gears one associated with each heater means and each mounting a combination reflector and shield means, and
  • the drive means operatively engages the plurality of driven gears for simultaneous rotation of the latter.

Abstract

An elongated suction hood has an open side adapted to face continuously moving sheet material to be dried by one or more elongated electrical heaters disposed in the hood. An elongated combination reflector and shield is mounted in the hood for rotational adjustment about each heater between a reflecting position on the side of the heater opposite the open side of the hood and a shielding position interposed between the heater and open side of the hood.

Description

United States Patent Nelson [54] DRIER FOR SHEET MATERIAL [72] inventor: Victor R. Nelson, 2700 SW. Summit Drive, Lake Oswego, Oreg. 97034 [22] Filed: June 1, 1970 211 Appl. No.: 41,785
[4 1 Jan. 25, 1972 3,406,954 l0/l968 2,664,282 l2/l953 Fannon ..263/3 Mann ..263/50 X Primary Examiner-Carroll B. Dority, Jr. Attorney-Oliver D. Olson [5 7] ABSTRACT An elongated suction hood has an open side adapted to face continuously moving sheet material to be dried by one or more elongated electrical heaters disposed in the hood. An elongated combination reflector and shield is mounted in the hood for rotational adjustment about each heater between a reflecting position on the side of the heater opposite the open side of the hood and a shielding position interposed between the heater and open side of the hood.
4 Claims, 3 Drawing Figures l h. "h.
. stock being dried.
DRIER FOR SIIEET MATERIAL BACKGROUND OF THE INVENTION This invention relates to driers, and more particularly to a drier for drying sheet stock during continuous passage through processing apparatus.
There are many industrial applications, such as paper converting, printing, etc., in which it is necessary or desirable to dry web stock as it progresses in a continuous strip through processing apparatus. In such applications it is important to be able to control the drier to prevent burning or other damage to the web stock in the event of stoppage or slow down of movement of the latter through the processing apparatus.
Driers of the class described heretofore have provided control against burning or damage of web stock by mechanism which moves the entire heater assembly away from the web stock. Because of the size and weight of such driers, the power requirement for their movement is considerable; the movement necessarily is sufficiently slow to prevent damage to the driers; and the space required to accommodate such driers and their movement necessarily limits the types of equipment with which such driers may be used.
SUMMARY OF THE INVENTION In its basic concept the drier of this invention utilizes a combination reflector and shield mounted on an elongated fixed housing for movement about an elongated heater between heat-reflecting and heat-shielding positions relative to sheet It is by virtue of the foregoing basic concept that the principal objective of this invention is achieved; namely, to overcome the aforementioned disadvantages of prior driers.
Another important object of this invention is the provision of a drier of the class described which is of simplified construction for economical manufacture, maintenance and repair.
The foregoing and other objects and advantages of this invention will appear fromthe following detailed description, taken in connection with the accompanying drawing of the preferred embodiment.
BRIEF DESCRIPTION OF THE DRAWING FIG. 3 is a diagrammatic elevation showing the drier of this invention in operative association with continuously moving sheet stock and illustrating means for controlling the drier by said moving sheet stock.
DESCRIPTION OF THE PREFERRED EMBODIMENT The drier illustrated in the drawing includes an elongated housing in the fonn of a suction hood. The hood is'formed by bending sheet metal along lines to provide the angled back wall and spaced sidewalls 12. The front of the hood is open and the ends are closed by end plates 14 secured to the back and sidewalls bysuch means as the screws 16.
The backwall preferably is lined internally with heat insulation material 18, such as sheet of Cerefelt secured to the inner surface of the backwall of adhesive or other suitable means.
Suction means is provided for withdrawing excessive heat from within the hood. In the embodiment illustrated, this means is provided by the hollow coupling 20. The open inlet end of the coupling is provided by a peripheral flange 22 which was secured to the rear wall 10 of the hood by such means as the screws 24. The inlet end of the coupling registers with correspondingly shaped openings in the rear wall and insulation material, as will be understood. The coupling includes an outlet extension 26 which is adapted to be connected to a conduit leading to a vacuum pump or exhaust fan (not shown) by which to create a suction within the hood.
In the embodiment illustrated there is associated with the hood a pair of laterally spaced, elongated heaters 28 and 30 which extend in the longitudinal direction of the hood. A single heater, or three or more heaters, may be associated with the housing, as will be understood. The heaters may be of any conventional type, such as an electrical resistance element en closed in a rod, etc. The heaters illustrated in the drawing are of that type, provided at their opposite ends with electrical terminals 32 for connection to a suitable source of electrical potential.
The heaters extend outward of the hood at their opposite ends, through openings provided in the end plates 14 as explained hereinafter, and are supported adjacent their outer ends by apertured brackets 34 secured to the end plates 14 as by means of screws 36. The brackets and hood are isolated electrically from terminals 32 by insulating washers 38.
Associated with each heater is acombination reflector and shield member 40. In the embodiment illustrated this member is in the form of an elongated strip of metal curved arcuately to semicircular cross-sectional shape. It is spaced from and extends along the length of the heater and is secured at each of its opposite ends, as by means of screws 42, to a flange 44 of a hollbw hub 46. The adjacent end of the heater extends freely through the hub, as shown.
Each hub is joumaled for rotation in a bearing 48 mounted in the associated end plate 14. A gear 50 is secured, as by a press fit, to each hub between the bearing 48 and flange 44.
The gears 50 associated with the combination reflector and shield members 40 are interconnected through common drive gear 52 secured to the opposite'e nds of an elongated drive shaft 54 as by means of keys 56. The opposite ends of the drive shaft are journaled in bearings 58 mounted in the end plates 14 of the hood.
It will be understood that the gears 50 associated with the combination reflector and shield members 40 may be arranged for direct interengagement and that the drive gear 52 may be arranged to engage only one of the gears 50. Such an arrangement is convenient when three or more heater assemblies are used in a hood.
One end of the drive shaft 54 is provided with an axial bore which is exposed through the hollow bearing 58 to the outer side of the end plate 14. This bore is arranged to receive the output shaft 60 of a drive motor 62 mounted on the outer side of the end plate. Means such as key 64 interconnects the output shaft and drive shaft for simultaneous rotation.
The drive motor may be electric, hydraulic or pneumatic. In any case, means is provided for controlling the driving of the motor to limit rotation of the gears 50 to 1 80 intervals. In this manner combination reflector and shield members 40 may be rotated between the heat-reflecting position illustrated in FIG. 2, wherein they are positioned on the side of the heater elements 28 and 30 opposite-the open end of the housing, and a shielding position in which they are interposed between the electric supply source through'the electric switch 78. The
switch may be of the type which includes a rotary member capable of connection through chain 82 to idler roll 70. The switch is maintained open while the strip of paper is moved continuously at a predetermined rate of speed. However, the switch closes when the rotational speed of roll 70 is decreased below a predetermined value, either by slowdown or breakage of the paper P.
Thus, in the event of breakage or slowdown of the sheet of paper, the drive motor 62 is activated to rotate the drive shaft 54 and gears 50 to move the combination reflector and shield members 40 quickly from the reflecting position illustrated in FIG. 2, to the shielding position previously described. In this manner the paper is shielded from damage by radiant energy from the heaters. The heat generated within the hood is carried away through the suction coupling 20.
Although only one heater is shown in association with each combination reflector and shield member 40, it is to be understood that two or more heaters may be so associated, if desired.
The length of the drier housing and heater elements may be varied to accommodate association with various types of processing apparatus. The cross-sectional dimension of the drier (FIG. 2) is minimized by the component arrangement illustrated. Since the housing is maintained in a fixed position relative to processing apparatus, the drier utilizes a minimum of space and therefore may be integrated into a wide variety of printing presses and other processing apparatus, without signifleant modification of the latter.
It will be apparent to those skilled in the art that various changes in the size, shape, number and arrangement of parts described hereinbefore may be made without departing from the spirit of this invention.
Having now described my invention and the manner in which it may be used, I claim:
1. A drier comprising a. an elongated housing having an open side,
b. elongated heater means in the housing projecting outward therefrom freely through an opening in at least one of the opposite ends of the housing,
c. support means on the housing releasably supporting the heater means thereon,
d. elongated combination reflector and shield means in the housing spaced from and extending parallel to the heater means,
e. driven gear means mounted rotatably on the housing independently of the heater means and having a central opening freely receiving the heater means therethrough,
f. drive means on the housing engaging the driven gear means for rotating the latter, and
g. means securing the combination reflector and shield means to the driven gear means for rotation therewith between a heat-reflecting position on the side of the heater means opposite the open side of the housing and a heat-shielding position interposed between the heater means and open side of the housing.
2. The drier of claim 1 including coupling means on the housing for communicating the interior of the latter with a source of suction.
3. The drier of claim 1 including drive gear means mounted rotatably on the housing and engaging the driven gear means, and rotary drive means on the housing engaging the drive gear means.
4. The drier of claim 1 wherein a. the heater means comprises a plurality of spaced elongated electric heaters,
b. the driven gear means comprises a plurality of driven gears one associated with each heater means and each mounting a combination reflector and shield means, and
c. the drive means operatively engages the plurality of driven gears for simultaneous rotation of the latter.

Claims (4)

1. A drier comprising a. an elongated housing having an open side, b. elongated heater means in the housing projecting outward therefrom freely through an opening in at least one of the opposite ends of the housing, c. support means on the housing releasably supporting the heater means thereon, d. elongated combination reflector and shield means in the housing spaced from and extending parallel to the heater means, e. driven gear means mounted rotatably on the housing independently of the heater means and having a central opening freely receiving the heater means therethrough, f. drive means on the housing engaging the driven gear means for rotating the latter, and g. means securing the combination reflector and shield means to the driven gear means for rotation therewith between a heatreflecting position on the side of the heater means opposite the open side of the housing and a heat-shielding position interposed between the heater means and open side of the housing.
2. The drier of claim 1 including coupling means on the housing for communicating the interior of the latter with a source of suction.
3. The drier of claim 1 including drive gear means mounted rotatably on the housing and engaging the driven gear means, and rotary drive means on the housing engaging the drive gear means.
4. The drier of claim 1 wherein a. the heater means comprises a plurality of spaced elongated electric heaters, b. the driven gear means comprises a plurality of driven gears one associated with each heater means and each mounting a combination reflector and shield means, and c. the drive means operatively engages the plurality of driven gears for simultaneous rotation of the latter.
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732061A (en) * 1971-06-03 1973-05-08 Champion Int Corp Reinforced page and method of printing on same
US3733709A (en) * 1971-05-06 1973-05-22 Sun Chemical Corp Reflector and cooling means therefor
US3826014A (en) * 1973-03-19 1974-07-30 Sun Chemical Corp Shutter mechanism for radiation-curing lamp
US3829982A (en) * 1972-06-15 1974-08-20 Thermogenics Of New York Ink curing and drying apparatus
US3864546A (en) * 1973-04-16 1975-02-04 Casso Solar System for irradiating a discontinuously moving web
US3894343A (en) * 1972-06-15 1975-07-15 Thermogenics Of New York Ink curing and drying apparatus
US3914594A (en) * 1973-03-19 1975-10-21 Sun Chemical Corp Radiation lamp reflector assembly
US3930318A (en) * 1973-04-23 1976-01-06 Continental Can Company, Inc. Ultraviolet curing machine
US4312137A (en) * 1979-02-01 1982-01-26 Veb Kombinat Polygraph "Werner Lamberz" Leipzig Drying device in a sheet-fed rotary printing press
DE3939368A1 (en) * 1989-11-29 1991-06-06 Siegfried Paarmann Printing mechanism with temp. controlled impression cylinder - has inner and outer sides of housing thermally insulated from each other
EP0715139A2 (en) * 1991-07-25 1996-06-05 G.E.W.(Ec) Ltd. U.V. dryers
WO1997038276A1 (en) * 1996-04-04 1997-10-16 Malcolm Charles Rae Uv dryers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2656449A (en) * 1951-05-01 1953-10-20 Gen Electric Canada Electric radiant heat drier
US2664282A (en) * 1950-04-01 1953-12-29 Selas Corp Of America Drier
US3406954A (en) * 1966-07-06 1968-10-22 Fostoria Fannon Inc Apparatus for web drying

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2664282A (en) * 1950-04-01 1953-12-29 Selas Corp Of America Drier
US2656449A (en) * 1951-05-01 1953-10-20 Gen Electric Canada Electric radiant heat drier
US3406954A (en) * 1966-07-06 1968-10-22 Fostoria Fannon Inc Apparatus for web drying

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733709A (en) * 1971-05-06 1973-05-22 Sun Chemical Corp Reflector and cooling means therefor
US3732061A (en) * 1971-06-03 1973-05-08 Champion Int Corp Reinforced page and method of printing on same
US3894343A (en) * 1972-06-15 1975-07-15 Thermogenics Of New York Ink curing and drying apparatus
US3829982A (en) * 1972-06-15 1974-08-20 Thermogenics Of New York Ink curing and drying apparatus
US3914594A (en) * 1973-03-19 1975-10-21 Sun Chemical Corp Radiation lamp reflector assembly
US3826014A (en) * 1973-03-19 1974-07-30 Sun Chemical Corp Shutter mechanism for radiation-curing lamp
US3864546A (en) * 1973-04-16 1975-02-04 Casso Solar System for irradiating a discontinuously moving web
US3930318A (en) * 1973-04-23 1976-01-06 Continental Can Company, Inc. Ultraviolet curing machine
US4312137A (en) * 1979-02-01 1982-01-26 Veb Kombinat Polygraph "Werner Lamberz" Leipzig Drying device in a sheet-fed rotary printing press
DE3939368A1 (en) * 1989-11-29 1991-06-06 Siegfried Paarmann Printing mechanism with temp. controlled impression cylinder - has inner and outer sides of housing thermally insulated from each other
EP0715139A2 (en) * 1991-07-25 1996-06-05 G.E.W.(Ec) Ltd. U.V. dryers
EP0715139A3 (en) * 1991-07-25 1997-03-12 G E W Ec Ltd U.V. dryers
WO1997038276A1 (en) * 1996-04-04 1997-10-16 Malcolm Charles Rae Uv dryers

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