WO2008065418A1 - A reflector - Google Patents

A reflector Download PDF

Info

Publication number
WO2008065418A1
WO2008065418A1 PCT/GB2007/004601 GB2007004601W WO2008065418A1 WO 2008065418 A1 WO2008065418 A1 WO 2008065418A1 GB 2007004601 W GB2007004601 W GB 2007004601W WO 2008065418 A1 WO2008065418 A1 WO 2008065418A1
Authority
WO
WIPO (PCT)
Prior art keywords
reflector
section
elliptical
arcuate
linear
Prior art date
Application number
PCT/GB2007/004601
Other languages
French (fr)
Inventor
Malcolm Rae
James Hicks
Original Assignee
Gew (Ec) Limited
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 Gew (Ec) Limited filed Critical Gew (Ec) Limited
Publication of WO2008065418A1 publication Critical patent/WO2008065418A1/en

Links

Classifications

    • 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
    • B41F23/0409—Ultra-violet dryers
    • 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
    • B41J11/0015—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 for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
    • 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
    • B41J11/0015—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 for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00218—Constructional details of the irradiation means, e.g. radiation source attached to reciprocating print head assembly or shutter means provided on the radiation source
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces

Definitions

  • This invention relates to a reflector and more especially to a reflector for use in apparatus for curing/drying ink.
  • Ink curing apparatus comprising a housing containing a lamp partially surrounded by at least one reflector to direct UV light onto a substrate to cure ink are well known.
  • the shape and construction of the or each reflector is vital to provide maximum efficiency of the apparatus by directing UV heat at critical angles to the substrate.
  • the present invention seeks to provide an improved reflector constructed as one-piece and having sections of varying shape and angle.
  • a reflector for inter alia ink curing apparatus constructed as a single piece and comprising a first arcuate section a second elliptical section and a third linear section.
  • a top section of the reflector is arcuate.
  • a middle section of the reflector is elliptical.
  • a bottom section of the reflector is linear.
  • Figure 1 is a side cross-section view of a reflector constructed in accordance with the present invention
  • Figure 2 is an exploded view of a first section A of the reflector of Figure 1;
  • Figure 3 is an exploded view of a second section B of the reflector of Figure 1;
  • Figure 4 is an exploded view of a third section C of the reflector of Figure 1;
  • Figure 5 is a schematic cross-sectional view of ink curing apparatus incorporating the reflector of Figure 1.
  • FIG 1 shows single-piece moulded glass reflector 10.
  • the reflector 10 comprises three sections A, B, C. These are shown in detail in Figures 2, 3 and 4 respectively.
  • the top section A of the reflector 10 is arcuate in shape. As can be seen in Figure 5, the arcuate shape of the top section A of the reflector 10 ensures that UV emitted from a lamp 12 which is directed to this part of the reflector 10 is deflected back past the side of the lamp 12. In prior art apparatus, where the top section of the reflector is elliptical, UV emitted from the lamp which is directed to that top section would be deflected back directly towards the lamp, this increases the temperature of the lamp which is not favourable.
  • the middle section B of the reflector 10 is elliptical in shape (see Figure 3). It has been found that the middle portion of the reflector being elliptical provides the most efficient angles of deflection of UV onto a substrate, as can be seen in Figure 5.
  • the bottom section C of the reflector 10 is linear in shape (see Figure 4). As can be seen in Figure 5, the linear shape of the bottom section C of the reflector 10 ensures that UV emitted from a lamp 12 which is directed to this part of the reflector 10 is deflected towards the substrate 14 at an angle of less than 42°. It has been found that UV hitting a substrate at an angle of greater than 42° results in the UV simply "bouncing off" the substrate. This is often found to be a problem with prior art reflectors that are elliptical in their lower part.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

A reflector for ink curing apparatus constructed as a single piece and having an arcuate section, an elliptical section and a linear section.

Description

A REFLECTOR
This invention relates to a reflector and more especially to a reflector for use in apparatus for curing/drying ink.
Ink curing apparatus comprising a housing containing a lamp partially surrounded by at least one reflector to direct UV light onto a substrate to cure ink are well known.
In such apparatus the shape and construction of the or each reflector is vital to provide maximum efficiency of the apparatus by directing UV heat at critical angles to the substrate.
It has long been regarded that suitable reflectors for such apparatus are elliptical.
The present invention seeks to provide an improved reflector constructed as one-piece and having sections of varying shape and angle.
Accordingly, in one aspect there is provided a reflector for inter alia ink curing apparatus, the reflector constructed as a single piece and comprising a first arcuate section a second elliptical section and a third linear section.
Preferably a top section of the reflector is arcuate. Preferably still, a middle section of the reflector is elliptical. Preferably still, a bottom section of the reflector is linear.
One embodiment of the present invention will now be described by way of example with reference to the accompanying drawings in which : Figure 1 is a side cross-section view of a reflector constructed in accordance with the present invention;
Figure 2 is an exploded view of a first section A of the reflector of Figure 1;
Figure 3 is an exploded view of a second section B of the reflector of Figure 1;
Figure 4 is an exploded view of a third section C of the reflector of Figure 1; and
Figure 5 is a schematic cross-sectional view of ink curing apparatus incorporating the reflector of Figure 1.
Figure 1 shows single-piece moulded glass reflector 10. The reflector 10 comprises three sections A, B, C. These are shown in detail in Figures 2, 3 and 4 respectively.
These figures show specific dimensions of each section, however it is to be understood that these dimensions are provided only as an example to illustrate the shape of that section.
The top section A of the reflector 10 is arcuate in shape. As can be seen in Figure 5, the arcuate shape of the top section A of the reflector 10 ensures that UV emitted from a lamp 12 which is directed to this part of the reflector 10 is deflected back past the side of the lamp 12. In prior art apparatus, where the top section of the reflector is elliptical, UV emitted from the lamp which is directed to that top section would be deflected back directly towards the lamp, this increases the temperature of the lamp which is not favourable. The middle section B of the reflector 10 is elliptical in shape (see Figure 3). It has been found that the middle portion of the reflector being elliptical provides the most efficient angles of deflection of UV onto a substrate, as can be seen in Figure 5.
The bottom section C of the reflector 10 is linear in shape (see Figure 4). As can be seen in Figure 5, the linear shape of the bottom section C of the reflector 10 ensures that UV emitted from a lamp 12 which is directed to this part of the reflector 10 is deflected towards the substrate 14 at an angle of less than 42°. It has been found that UV hitting a substrate at an angle of greater than 42° results in the UV simply "bouncing off" the substrate. This is often found to be a problem with prior art reflectors that are elliptical in their lower part.
It will be appreciated that the foregoing is merely exemplary of one embodiment of the reflector according to the present invention and of just one form of ink curing apparatus with which it may be used. The skilled reader will understand that modifications can readily be made thereto without departing from the true scope of the invention.

Claims

1. A reflector for inter alia ink curing apparatus, the reflector constructed as a single piece and comprising a first arcuate section a second elliptical section and a third linear section.
2. A reflector according to claim 1, wherein a top section of the reflector is arcuate.
3. A reflector according to claim 2, wherein a middle section of the reflector is elliptical.
4. A reflector according to claim 3 wherein a bottom section of the reflector is linear.
5. A reflector substantially as hereinbefore described and referred to in the accompanying figures.
PCT/GB2007/004601 2006-12-01 2007-11-30 A reflector WO2008065418A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0624075.8 2006-12-01
GBGB0624075.8A GB0624075D0 (en) 2006-12-01 2006-12-01 a reflector

Publications (1)

Publication Number Publication Date
WO2008065418A1 true WO2008065418A1 (en) 2008-06-05

Family

ID=37671727

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/004601 WO2008065418A1 (en) 2006-12-01 2007-11-30 A reflector

Country Status (2)

Country Link
GB (1) GB0624075D0 (en)
WO (1) WO2008065418A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021030902A1 (en) * 2019-08-21 2021-02-25 Acuva Technologies Inc. Ultraviolet light emitter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655383A1 (en) * 1975-12-08 1977-06-30 Scal Gp Condit Aluminium CYLINDRICAL REFLECTOR WITH ELLIPTICAL SECTION-SHAPED CROSS-SECTION
DE4136251A1 (en) * 1990-11-12 1992-05-14 Siemens Ag Indirect reflection lamp with doubled free emission angle - has point source in tubular envelope extending through main reflector towards central peak of auxiliary reflector
US6323601B1 (en) * 2000-09-11 2001-11-27 Nordson Corporation Reflector for an ultraviolet lamp system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655383A1 (en) * 1975-12-08 1977-06-30 Scal Gp Condit Aluminium CYLINDRICAL REFLECTOR WITH ELLIPTICAL SECTION-SHAPED CROSS-SECTION
DE4136251A1 (en) * 1990-11-12 1992-05-14 Siemens Ag Indirect reflection lamp with doubled free emission angle - has point source in tubular envelope extending through main reflector towards central peak of auxiliary reflector
US6323601B1 (en) * 2000-09-11 2001-11-27 Nordson Corporation Reflector for an ultraviolet lamp system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021030902A1 (en) * 2019-08-21 2021-02-25 Acuva Technologies Inc. Ultraviolet light emitter

Also Published As

Publication number Publication date
GB0624075D0 (en) 2007-01-10

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