EP0269209A1 - Improvements in and relating to framing for windows or other panelling - Google Patents

Improvements in and relating to framing for windows or other panelling Download PDF

Info

Publication number
EP0269209A1
EP0269209A1 EP87307763A EP87307763A EP0269209A1 EP 0269209 A1 EP0269209 A1 EP 0269209A1 EP 87307763 A EP87307763 A EP 87307763A EP 87307763 A EP87307763 A EP 87307763A EP 0269209 A1 EP0269209 A1 EP 0269209A1
Authority
EP
European Patent Office
Prior art keywords
members
frame
frame construction
extrusion
panelling
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.)
Withdrawn
Application number
EP87307763A
Other languages
German (de)
French (fr)
Inventor
Alan Roger Zebedee
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.)
Nouveaux Security Products Ltd
Original Assignee
Nouveaux Security Products Ltd
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 Nouveaux Security Products Ltd filed Critical Nouveaux Security Products Ltd
Publication of EP0269209A1 publication Critical patent/EP0269209A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
    • E06B1/04—Frames for doors, windows, or the like to be fixed in openings
    • E06B1/12—Metal frames
    • E06B1/18—Metal frames composed of several parts with respect to the cross-section of the frame itself
    • E06B1/20—Metal frames composed of several parts with respect to the cross-section of the frame itself adjustable with respect to the thickness of walls
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/54—Fixing of glass panes or like plates
    • E06B3/58—Fixing of glass panes or like plates by means of borders, cleats, or the like
    • E06B3/5892—Fixing of window panes in openings in door leaves

Definitions

  • the present invention relates to a frame construction essentially, but not exclusively for windows, and in particular to frame parts made as extrusion members.
  • a known window frame construction is formed by a plurality of elongate extrusion members typically alloy, for say top, bottom and two sides (minimum of four), which are fitted within an aperture in a framework, door or other support means.
  • Each extrusion member has a generally J-shaped cross-section, with the stem of the extrusion provided with holes for securing it by means of screws or the like to the support means.
  • an elongate locating bead is provided which serves to hold the glass in place within the frame. The locating bead engages with the turned in J-end of the extrusion member to press the glass towards one half of the head of the extrusion member. The other half of the head is normally positioned up to support means, usually on the internal side.
  • the described frame construction suffers from the disadvantage that fixing in position is time consuming by the need to fix screws in position, and the resulting fixing, in a forced entry situation, can break away relatively easily.
  • a frame construction for holding glass or other panelling in a support structure comprising first and second elongate extrusion members to locate the members relative to one another about support means for the frame with a respective rim part of each member disposed adjacent opposite sides of the support means.
  • the keying means comprises barb like projections and recesses on the two members with inclined teeth arranged to slip over one another on assembly as the two members are slid towards one another, yet keying with one another to prevent movement apart of the two members at least in one plane, the two members overlap one another to provide the keying means.
  • the members have a respective flange part extending generally normal to the plane of the of the window or panelling, which parts overlap to a lesser or greater extent on assembly depending on the thickness of the support, (door panel etc.) to which the window/panelling is to be fitted.
  • Said flange parts carry the keying means.
  • one of the extrusion members is generally of J-shaped cross-section, with the stem carrying the keying means in the form of teeth on the side opposite to the direction of the in turned J-end, whilst the other extrusion member is of generally L-shaped cross-section.
  • the L-shaped extrusion member is fitted closest to the support means, with the stem of the other member overlying it.
  • Figure 1 shows a section through one side of a window frame construction.
  • the support means is shown at 1. This may be a door panel with an opening in it to be fitted with the window, a frame member of stud wall partitioning, or even masonry.
  • one extrusion member 3 is of simple L-shaped cross-section although more complicated sections may be utilised providing they have a rim part 5, and a flange part 7.
  • the L-shape embraces an edge of the support means, with the rim part 5 positioned up to a surface of the support and the flange part 7 against the boundary of the aperture to which the frame is fitted, or some packing means therebetween for spacing purposes.
  • the other member 9 is of generally J-shaped construction, being more complicated to facilitate window pane placement and retention. It provides a rim part 11 which is positioned up to an opposite surface of the support means, i.e. on an opposite side thereof to the rim part 5.
  • the stem of the J-shape constitutes a flange part 13, which is positioned overlying the flange part 7.
  • a window pane shown dotted at 19, is held in position against the abutment 15 by a locating bead 21, which is in the form of an elongate extrusion, which engages with the lip 17.
  • Each of the extrusion members 3, 9 has mutually engagable keying means, which take the form of teeth 23 shown in larger detail in Figure 2, the encircled part A of Figure 1.
  • the teeth have inclined parts 25 and shoulders 27.
  • the shape of the teeth is such as to allow relative movement between the members in the direction of the arrows B, but to prevent movement in the opposite direction.
  • the stem part 13 has teeth substantially along its entire width as shown, whilst the flange part 7 has teeth principally at the end thereof (say four teeth). This is to allow various thicknesses of door panel etc. to be accommodated. Teeth of 1 mm height and a pitch of 2 mm are considered satisfactory.
  • the frame construction is held securely in position in the aperture in the support means, because, the extrusion member 3 is held against the support means and the extrusion member 9 is held against the member 3.
  • the keying means is effective to prevent outward displacement of both members, i.e. away from the position embracing the support means.
  • the window pane is held in place by positioning the locating bead 21 so that it engages between the turned in J end 17 and the window pane 19. Screws are used to locate the bead securely in position, with the screws passing through the extrusion member and into the support means.
  • fixing means may be employed, for example screw means passing through holes, in one or both of the flange parts 7, 13, see dotted outline of hole at 29.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Securing Of Glass Panes Or The Like (AREA)

Abstract

In order to render framing for panelling, especially for a window pane (19), easier to fix and yet more secure we provide first (9) and second (3) extrusion members arranged to embrace opposite sides of support means (1) for the frame, and provide mutually engagable keying means (23) between the extrusion members to allow interconnection in one direction but to resist separation in the other direction. The keying means conveniently takes the form of barb like projection and recess means.

Description

  • The present invention relates to a frame construction essentially, but not exclusively for windows, and in particular to frame parts made as extrusion members.
  • A known window frame construction is formed by a plurality of elongate extrusion members typically alloy, for say top, bottom and two sides (minimum of four), which are fitted within an aperture in a framework, door or other support means. Each extrusion member has a generally J-shaped cross-section, with the stem of the extrusion provided with holes for securing it by means of screws or the like to the support means. For each extrusion member, an elongate locating bead is provided which serves to hold the glass in place within the frame. The locating bead engages with the turned in J-end of the extrusion member to press the glass towards one half of the head of the extrusion member. The other half of the head is normally positioned up to support means, usually on the internal side.
  • The described frame construction suffers from the disadvantage that fixing in position is time consuming by the need to fix screws in position, and the resulting fixing, in a forced entry situation, can break away relatively easily.
  • Accordingly, it is an aim of the present invention to provide a frame construction for a window or another panel which is more easily fixed in position and yet which affords a more secure fixing.
  • According to the present invention then, there is provided a frame construction for holding glass or other panelling in a support structure, comprising first and second elongate extrusion members to locate the members relative to one another about support means for the frame with a respective rim part of each member disposed adjacent opposite sides of the support means.
  • In one embodiment the keying means comprises barb like projections and recesses on the two members with inclined teeth arranged to slip over one another on assembly as the two members are slid towards one another, yet keying with one another to prevent movement apart of the two members at least in one plane, the two members overlap one another to provide the keying means.
  • More particularly, the members have a respective flange part extending generally normal to the plane of the of the window or panelling, which parts overlap to a lesser or greater extent on assembly depending on the thickness of the support, (door panel etc.) to which the window/panelling is to be fitted. Said flange parts carry the keying means.
  • More especially, one of the extrusion members is generally of J-shaped cross-section, with the stem carrying the keying means in the form of teeth on the side opposite to the direction of the in turned J-end, whilst the other extrusion member is of generally L-shaped cross-section. The L-shaped extrusion member is fitted closest to the support means, with the stem of the other member overlying it.
  • With say a rectangular frame formed by assembling the extrusion members within an aperture, and the glass fitted in position, the J-section extrusion member is held in contact with the other extrusion member so that the keying means are held in contact and the frame cannot be displaced from the aperture by force as any impact applied to one or other of the members causes the frame members to grip more tightly the support means. Screws may be employed additionally through one or both of the flange sections to further aid security.
  • It will however be appreciated that the assembly can be made quickly by use of the construction according to the present invention.
  • The present invention will now be described further hereinafter, by way of example only in relation to a window frame, with reference to the accompanying drawings; in which:-
    • Figure 1 is a section through one embodiment of extrusion according to the present invention, and
    • Figure 2 is a detail of the preferred keying means.
  • The drawing of Figure 1 shows a section through one side of a window frame construction. The support means is shown at 1. This may be a door panel with an opening in it to be fitted with the window, a frame member of stud wall partitioning, or even masonry.
  • In the illustrated embodiment one extrusion member 3, is of simple L-shaped cross-section although more complicated sections may be utilised providing they have a rim part 5, and a flange part 7. As will be seen, the L-shape embraces an edge of the support means, with the rim part 5 positioned up to a surface of the support and the flange part 7 against the boundary of the aperture to which the frame is fitted, or some packing means therebetween for spacing purposes.
  • The other member 9 is of generally J-shaped construction, being more complicated to facilitate window pane placement and retention. It provides a rim part 11 which is positioned up to an opposite surface of the support means, i.e. on an opposite side thereof to the rim part 5. The stem of the J-shape constitutes a flange part 13, which is positioned overlying the flange part 7. Also provided is a window pane abutment 15 and an inturned lip 17.
  • A window pane, shown dotted at 19, is held in position against the abutment 15 by a locating bead 21, which is in the form of an elongate extrusion, which engages with the lip 17.
  • Each of the extrusion members 3, 9 has mutually engagable keying means, which take the form of teeth 23 shown in larger detail in Figure 2, the encircled part A of Figure 1. The teeth have inclined parts 25 and shoulders 27. The shape of the teeth is such as to allow relative movement between the members in the direction of the arrows B, but to prevent movement in the opposite direction.
  • The stem part 13 has teeth substantially along its entire width as shown, whilst the flange part 7 has teeth principally at the end thereof (say four teeth). This is to allow various thicknesses of door panel etc. to be accommodated. Teeth of 1 mm height and a pitch of 2 mm are considered satisfactory.
  • Once the extrusion members have been fitted in position, and the window pane located in place, the frame construction is held securely in position in the aperture in the support means, because, the extrusion member 3 is held against the support means and the extrusion member 9 is held against the member 3. Thus, the keying means is effective to prevent outward displacement of both members, i.e. away from the position embracing the support means. The window pane is held in place by positioning the locating bead 21 so that it engages between the turned in J end 17 and the window pane 19. Screws are used to locate the bead securely in position, with the screws passing through the extrusion member and into the support means.
  • By this simple construction, the assembly of a window frame is made easier and yet provides a secure fixing.
  • To further aid security, fixing means may be employed, for example screw means passing through holes, in one or both of the flange parts 7, 13, see dotted outline of hole at 29.
  • It will be understood that the glass may be replaced by other panelling.

Claims (10)

1. A frame construction for holding glass or other panelling in a support structure, comprising a first elongate extrusion member (9) for holding the glass or other panelling (19) and characterised by a second elongate extrusion member (3) and mutually engagable keying means (23) between the first and second members to locate the members relative to one another about support means (1) for the frame with a respective rim part (11,5) of each member disposed adjacent opposite sides of the support means.
2. A frame construction as claimed in claim 1 in which the keying means comprises barb like projections and recesses on the two members with inclined teeth (23) arranged to slip over one another on assembly as the two members are slid towards one another, yet keying with one another to resist movement apart of the two members in the opposite direction.
3. A frame construction as claimed in claim 1 or 2 in which the members have a respective flange part (13, 7) extending generally normal to the plane of the glass/panelling (19), which parts overlap to a lesser or greater extent on assembly depending on the thickness of the support, to which the frame is to be fitted.
4. A frame construction as claimed in claim 3 in which said flange parts carry the keying means.
5. A frame construction as claimed in any one of claims 1 to 4 in which a first one of the extrusion members (9) is generally of J-shaped cross-section, with the stem (13) carrying the keying means in the form of teeth (23) on the side opposite to the direction of the in turned J-end.
6. A frame construction as claimed in claim 5 in which the second one of the extrusion members (3) is of generally L-shaped cross-section.
7. A frame construction as claimed in claim 6 in which the L-shaped extrusion member is fitted closest to the support means, with the stem of the first member overlying it.
8. A frame construction as claimed in any one of the preceding claims in which the first and second extrusion members are held with the keying means in engagement by the presence of glass or panelling in the frame.
9. A frame construction as claimed in claim 8 in which the cooperation of the frame members, the presence of the panelling and the form of the keying means is such as to cause the frame members to grip more tightly the support means if any separation force is applied to the frame members.
10. A frame construction as claimed in any one of the preceding claims further comprising fixing means through one or both of the extrusion members into the support means.
EP87307763A 1986-09-04 1987-09-03 Improvements in and relating to framing for windows or other panelling Withdrawn EP0269209A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8621372 1986-09-04
GB868621372A GB8621372D0 (en) 1986-09-04 1986-09-04 Window frame construction

Publications (1)

Publication Number Publication Date
EP0269209A1 true EP0269209A1 (en) 1988-06-01

Family

ID=10603688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87307763A Withdrawn EP0269209A1 (en) 1986-09-04 1987-09-03 Improvements in and relating to framing for windows or other panelling

Country Status (2)

Country Link
EP (1) EP0269209A1 (en)
GB (2) GB8621372D0 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2211535A (en) * 1987-10-28 1989-07-05 Saturn Windows Window assemblies
US5461117A (en) * 1988-09-28 1995-10-24 Exfluor Research Corporation Liquid phase fluorination
GB2317410A (en) * 1996-09-18 1998-03-25 Andrew Pewter Two-part depth adjustable frames for doors and windows
GB2338977A (en) * 1998-07-01 2000-01-12 Int Aluminum Corp Wall framing system
WO2003021068A1 (en) * 2001-08-28 2003-03-13 Canimex, Inc. Door or wall window insert frame and method
NL1028191C2 (en) * 2005-02-04 2006-08-07 Ubbink Bv Passage device for a wall.
GB2424440A (en) * 2005-03-24 2006-09-27 Springfast Ltd Window frame fixing system comprising releasable clips
GB2548605A (en) * 2016-03-23 2017-09-27 Hocking Steven A clip assembly

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8807102D0 (en) * 1988-03-24 1988-04-27 Webber M Window adaptor
GB2238070B (en) * 1989-11-18 1993-10-13 Kenneth Robert Boomer Improved building product
DE19640551C2 (en) * 1996-10-01 2000-06-21 Weimar Karl Heinz Door or window element
FR2781514B1 (en) * 1998-07-27 2000-10-13 Saga Productions IMPROVED TRAPPON AND METHOD FOR ACCESSING A FALSE CEILING
GB2341410A (en) * 1998-09-09 2000-03-15 Selecta Window Systems Limited Window mounting method
GB2361501A (en) * 1999-11-12 2001-10-24 Bowater Windows Ltd Door and window assemblies
IES20000243A2 (en) * 2000-03-31 2001-10-03 Martin Patrick Shannon A mounting bracket for mounting a frame in a wall opening
US6526709B1 (en) * 2002-01-09 2003-03-04 Rodney Allen Jacobsen Replacement window installation and flashing system
GB0304181D0 (en) * 2003-02-25 2003-03-26 Pritchard Plastics Ltd Panel frame assembly
US10329759B2 (en) 2012-09-17 2019-06-25 Steelcase Inc. Floor-to-ceiling partition wall assembly
US9506247B2 (en) 2014-03-28 2016-11-29 Steelcase Inc. Transparent panel system for partitions
ITFI20130026A1 (en) * 2013-01-31 2014-08-01 Roberto Bianco GASKET SYSTEM FOR WINDOWS FOR WINDOWS
WO2015032400A1 (en) * 2013-09-04 2015-03-12 Bsi A/S A hatch comprising a frame and means for mounting the frame
EP2865838A1 (en) * 2013-10-24 2015-04-29 Dutch Global Sourcing B.V. Window frame

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1201102A (en) * 1957-09-13 1959-12-28 Kommerling G M B H Geb Auxiliary clamping frame for windows
US3363365A (en) * 1965-07-27 1968-01-16 George F. Laepple Prefabricated light units
GB1120120A (en) * 1964-09-25 1968-07-17 Goodrich Co B F Extruded synthetic plastics strips for glazing and panel mounting
US3520085A (en) * 1968-12-04 1970-07-14 American Air Filter Co Adjustable door frame
GB1216370A (en) * 1967-07-07 1970-12-23 Monsanto Co Frames
FR2154931A5 (en) * 1971-09-30 1973-05-18 Midi Moulages Plast
DE2321866A1 (en) * 1973-04-30 1974-11-07 Meisinger Kg M SUPPORTING FRAME TO BE INSERTED IN A WALL FOR A WINDOW FRAME, IN PARTICULAR BASEMENT WINDOW FRAME

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750358A (en) * 1971-09-09 1973-08-07 Rimar Mfg Inc Self locking door light molding
DE2249265C3 (en) * 1972-10-07 1981-04-09 August Bilstein GmbH & Co KG, 5828 Ennepetal Fastening a modernization window to the stick frame of the old window that remains in the wall
DE2457556A1 (en) * 1974-12-05 1976-06-10 Marley Werke Gmbh DOOR FRAME AND PROFILES FOR THE MANUFACTURE OF A DOOR FRAME
US4524978A (en) * 1983-08-31 1985-06-25 Ampat/Midwest Corp. Simulated structural gasket
GB8333637D0 (en) * 1983-12-16 1984-01-25 British Alcan Aluminium Ltd Structural members for supporting panels
FR2596801B1 (en) * 1986-04-04 1988-08-26 Boidron Guy IMPROVEMENTS ON SLEEPING FRAMES ON DOORS AND WINDOWS

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1201102A (en) * 1957-09-13 1959-12-28 Kommerling G M B H Geb Auxiliary clamping frame for windows
GB1120120A (en) * 1964-09-25 1968-07-17 Goodrich Co B F Extruded synthetic plastics strips for glazing and panel mounting
US3363365A (en) * 1965-07-27 1968-01-16 George F. Laepple Prefabricated light units
GB1216370A (en) * 1967-07-07 1970-12-23 Monsanto Co Frames
US3520085A (en) * 1968-12-04 1970-07-14 American Air Filter Co Adjustable door frame
FR2154931A5 (en) * 1971-09-30 1973-05-18 Midi Moulages Plast
DE2321866A1 (en) * 1973-04-30 1974-11-07 Meisinger Kg M SUPPORTING FRAME TO BE INSERTED IN A WALL FOR A WINDOW FRAME, IN PARTICULAR BASEMENT WINDOW FRAME

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2211535A (en) * 1987-10-28 1989-07-05 Saturn Windows Window assemblies
GB2211535B (en) * 1987-10-28 1992-03-25 Saturn Windows Window assemblies
US5461117A (en) * 1988-09-28 1995-10-24 Exfluor Research Corporation Liquid phase fluorination
GB2317410A (en) * 1996-09-18 1998-03-25 Andrew Pewter Two-part depth adjustable frames for doors and windows
GB2338977A (en) * 1998-07-01 2000-01-12 Int Aluminum Corp Wall framing system
US6050036A (en) * 1998-07-01 2000-04-18 International Aluminum Corporation Flange mounted framing system
WO2003021068A1 (en) * 2001-08-28 2003-03-13 Canimex, Inc. Door or wall window insert frame and method
NL1028191C2 (en) * 2005-02-04 2006-08-07 Ubbink Bv Passage device for a wall.
GB2424440A (en) * 2005-03-24 2006-09-27 Springfast Ltd Window frame fixing system comprising releasable clips
GB2424440B (en) * 2005-03-24 2008-12-31 Springfast Ltd Fixing system
GB2548605A (en) * 2016-03-23 2017-09-27 Hocking Steven A clip assembly
GB2548605B (en) * 2016-03-23 2021-03-31 Hocking Steven A clip assembly

Also Published As

Publication number Publication date
GB8621372D0 (en) 1986-10-15
GB2196045A (en) 1988-04-20
GB2196045B (en) 1990-04-25
GB8720755D0 (en) 1987-10-07

Similar Documents

Publication Publication Date Title
EP0269209A1 (en) Improvements in and relating to framing for windows or other panelling
US5481839A (en) Glazed panel wall construction and method for assembly thereof
US6088979A (en) Frame for supporting an auxiliary glazing and method for installing the improved frame
JP2010501747A (en) Frame assembly for seat material
JPH09125827A (en) Reinforcing structure of vertical frame material
US5155956A (en) Metal window construction
GB2221713A (en) Glazing
JPH09209658A (en) Fitting structure of batten for frame member
US4756135A (en) Window frame assembly
GB2233697A (en) Glazing retainer
US3276178A (en) Fittings for mounting a pane or a sheet in a rabbet
EP0288195A2 (en) Panel joint
KR960000749A (en) Elevator honeycomb panel and its fastening structure and its fastening method
GB2191809A (en) Window
JP2007153518A (en) Landing hall device of elevator
JPH1113354A (en) Sliding door rail, and joint construction of stile and rail
GB2148371A (en) Glazing
JPS634781Y2 (en)
AU2021102984A4 (en) Method and apparatus for retaining a sheet of planar material
JP7356731B2 (en) Window unit mounting structure
IE950707A1 (en) Corner security clip
JP2800707B2 (en) Fittings
KR200242638Y1 (en) seperation window fixing clip
JP3075089B2 (en) Unit bus ceiling fixing structure
KR200148759Y1 (en) Roller cover structure for window

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR IT

17P Request for examination filed

Effective date: 19881201

17Q First examination report despatched

Effective date: 19900424

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19910403

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ZEBEDEE, ALAN ROGER