<titlePart> <text>SECTION B <emdash/> PERFORMING OPERATIONS</text> </titlePart> <titlePart> <text>TRANSPORTING</text> </titlePart> LIQUID/LIQUID, LIQUID/GAS OR GAS/GAS SEPARATION Method General operations by centrifugal force, using centrifuges or free-vortex apparatus using magnetic or electrostatic effect Apparatus General operations by centrifugal force, using centrifuges or free-vortex apparatus , using magnetic or electrostatic effect SOLID/LIQUID OR SOLID/GAS SEPARATION Method General operations by centrifugal force using centrifuges or free-vortex apparatus using magnetic or electrostatic effect Apparatus General operations by centrifugal force using centrifuges or free-vortex apparatus , using magnetic or electrostatic effect SOLID/SOLID SEPARATION Method Dry methods material in bulk Individual sorting Screening, sifting, pneumatic sorting using pneumatic tables or jigs by magnetic or electrostatic effect by centrifugal force using centrifuges or free-vortex apparatus Wet methods General operations flotation, differential sedimentation screening Combinations Dry methods - wet methods Apparatus Dry methods material in bulk Individual sorting Screening, sifting, pneumatic sorting using pneumatic tables or jigs by magnetic or electrostatic effect by centrifugal force using centrifuges or free-vortex apparatus , Wet methods General operations flotation, differential sedimentation screening Combinations Dry methods - wet methods <titlePart> <text>PRINTING</text> </titlePart> <titlePart> <text>WRITING OR DRAWING IMPLEMENTS</text> </titlePart> <titlePart> <text>BUREAU ACCESSORIES</text> </titlePart> <titlePart> <text>ARTICLES FOR WRITING OR DRAWING UPON</text> </titlePart> <titlePart> <text>ACCESSORIES FOR WRITING OR DRAWING</text> <entryReference>workshop equipment for marking-out work <sref ref="B25H0007000000"/></entryReference> <entryReference>teaching hand-writing or drawing <sref ref="G09B0011000000"/></entryReference> </titlePart> This subclass does not cover devices used for both teaching and facilitating writing or drawing, which are covered by group . ARTICLES FOR WRITING OR DRAWING UPON Boards or tablets Underlays Drawing-boards AIDS FOR DRAWING Straight lines Circles Other curves Means to prevent slippage Other figures ATTACHMENT TO HANDS OR ARMS BLOTTERS ACCESSORIES FOR Rubbing or erasing Cleaning blackboards or slates Sharpening pencils or leads INK RECEPTACLES; INK STANDS ; <titlePart> <text>Articles for writing or drawing upon</text> </titlePart> <titlePart> <text>Repeatedly-usable boards or tablets for writing or drawing</text> <entryReference>drawing-boards <sref ref="B43L0005000000"/></entryReference> </titlePart> <titlePart> <text>Slates</text> </titlePart> <titlePart> <text>Blackboards</text> <entryReference>easels or stands for blackboards <sref ref="A47B0097040000"/></entryReference> </titlePart> <titlePart> <text>rigid</text> </titlePart> <titlePart> <text>flexible</text> </titlePart> <titlePart> <text>Writing surfaces thereof</text> </titlePart> <titlePart> <text>having translucent writing surfaces producing visual impressions by co-operation with backing members</text> </titlePart> <titlePart> <text>Writing or drawing-underlays, e.g. blotting pads</text> <entryReference>blotters <sref ref="B43L0017000000"/></entryReference> </titlePart> <titlePart> <text>Drawing-boards</text> <entryReference>drawing-desks or tables <sref ref="A47B0027000000"/>, <sref ref="A47B0085020000"/></entryReference> <entryReference>stands for drawing-boards <sref ref="A47B0097040000"/></entryReference> </titlePart> <titlePart> <text>having means for clamping sheets of paper thereto</text> <entryReference>drawing-pins <sref ref="B43M0015000000"/></entryReference> </titlePart> <titlePart> <text>Writing or drawing aids</text> </titlePart> <titlePart> <text>Straightedges</text> <entryReference>guides for rulers other than for T-squares <sref ref="B43L0013040000"/></entryReference> <entryReference>curve rulers or templets <sref ref="B43L0013200000"/></entryReference> <entryReference>straightedges characterised by the provision of indicia or the like for measuring, e.g. rulers or tapes with measuring scales or marks for direct reading, <sref ref="G01B"/></entryReference> </titlePart> In this group, the following term is used with the meaning indicated: "straightedge" means an instrument or its edge serving the purpose of acting as a guide for the drawing of a straight line. <titlePart> <text>T-squares</text> </titlePart> <titlePart> <text>Plural non-adjustable straightedges fixed at right angles</text> <entryReference><sref ref="B43L0007020000"/> takes precedence</entryReference> </titlePart> <titlePart> <text>Plural non-adjustable straightedges forming non-right angles</text> </titlePart> <titlePart> <text>with rollers</text> <entryReference>with interconnected rollers <sref ref="B43L0013020000"/></entryReference> </titlePart> <titlePart> <text>with arrangements for attaching additional drawing equipment, e.g. for hatching, dotting</text> </titlePart> <titlePart> <text>Plural straightedges relatively movable</text> </titlePart> <titlePart> <text>Square and pivoting straightedges</text> </titlePart> <titlePart> <text>Square and sliding straightedges</text> </titlePart> <titlePart> <text>Circular curve-drawing or like instruments</text> <entryReference>curve rulers or templets <sref ref="B43L0013200000"/></entryReference> </titlePart> <titlePart> <text>Compasses</text> <entryReference>proportional compasses <sref ref="B43L0009080000"/></entryReference> <entryReference>compasses for drawing spirals <sref ref="B43L0011060000"/></entryReference> </titlePart> <titlePart> <text>Beam compasses</text> </titlePart> <titlePart> <text>with legs formed by flat springs</text> </titlePart> <titlePart> <text>Proportional compasses or dividers</text> </titlePart> <titlePart> <text>with arrangements for drawing polygons</text> </titlePart> <titlePart> <text>Dividers</text> <entryReference>proportional dividers <sref ref="B43L0009080000"/></entryReference> </titlePart> <titlePart> <text>with changeable leg-ends for conversion into compasses, dividers, or callipers</text> <entryReference><sref ref="B43L0009240000"/> takes precedence</entryReference> </titlePart> <titlePart> <text>Features common to compasses, dividers, or callipers</text> </titlePart> <titlePart> <text>Legs with toggle joints</text> </titlePart> <titlePart> <text>Pivots</text> </titlePart> <titlePart> <text>Leg-angle adjusting-means separate from pivots</text> </titlePart> <titlePart> <text>Means for mounting points or writing appliances on legs</text> </titlePart> <titlePart> <text>Non-circular-curve-drawing instruments</text> <entryReference>curve rulers or templets <sref ref="B43L0013200000"/></entryReference> </titlePart> <titlePart> <text>for drawing conic sections</text> </titlePart> <titlePart> <text>for drawing ellipses</text> </titlePart> <titlePart> <text>with cords or like flexible elements</text> </titlePart> <titlePart> <text>with gears</text> </titlePart> <titlePart> <text>with guides</text> </titlePart> <titlePart> <text>for drawing spirals</text> </titlePart> <titlePart> <text>for drawing involutes</text> </titlePart> <titlePart> <text>Means to prevent slippage</text> </titlePart> <titlePart> <text>magnetic</text> </titlePart> <titlePart> <text>Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for</text> <entryReference>stencils for surface decoration <sref ref="B44D"/></entryReference> </titlePart> <titlePart> <text>Drafting machines or drawing devices for keeping parallelism</text> <entryReference>T-squares <sref ref="B43L0007020000"/></entryReference> </titlePart> <titlePart> <text>Guides for rulers</text> </titlePart> <titlePart> <text>with pivoted guide rods</text> </titlePart> <titlePart> <text>Protractor heads</text> </titlePart> <titlePart> <text>Pantographic instruments for copying, enlarging, or diminishing</text> <entryReference>arrangements for copying in machine tools <sref ref="B23Q"/></entryReference> </titlePart> <titlePart> <text>Multiple writing devices</text> </titlePart> <titlePart> <text>Devices for drawing in perspective</text> </titlePart> <titlePart> <text>free-hand</text> </titlePart> <titlePart> <text>having optical or projecting equipment</text> <entryReference>optical systems or apparatus <sref ref="G02B"/></entryReference> <entryReference>projectors <sref ref="G03B"/></entryReference> </titlePart> <titlePart> <text>Curve rulers or templets</text> </titlePart> <titlePart> <text>Adjustable curve rulers</text> </titlePart> <titlePart> <text>Devices for generating stepwise movements of drawing equipment, e.g. for hatching</text> </titlePart> <titlePart> <text>Supports for attachment to hands or arms for facilitating writing or drawing</text> </titlePart> <titlePart> <text>Blotters</text> <entryReference>blotting pads <sref ref="B43L0003000000"/></entryReference> <entryReference>combined with writing implements <sref ref="B43K0029040000"/></entryReference> <entryReference>making blotting paper <sref ref="D21F0011140000"/></entryReference> </titlePart> <titlePart> <text>for blotting-paper sheets</text> </titlePart> <titlePart> <text>hand-held</text> </titlePart> <titlePart> <text>for reeled blotting-paper</text> </titlePart> <titlePart> <text>Roller blotters</text> </titlePart> <titlePart> <text>using blotting material other than paper</text> </titlePart> <titlePart> <text>Erasers, rubbers, or erasing devices</text> </titlePart> <titlePart> <text>Holders therefor</text> <entryReference>rubbers or erasing knives combined with writing implements <sref ref="B43K0029020000"/>, <sref ref="B43K0029180000"/></entryReference> </titlePart> <titlePart> <text>Erasing knives</text> <entryReference>knives in general <sref ref="B26B"/></entryReference> </titlePart> <titlePart> <text>Fibrous erasers</text> </titlePart> <titlePart> <text>Blackboard or slate-cleaning devices</text> </titlePart> <titlePart> <text>with means for absorbing the chalk dust</text> </titlePart> <titlePart> <text>Wiper holders</text> </titlePart> <titlePart> <text>Sharpeners for pencils or leads</text> <entryReference>grinding or cutting tools in general <sref ref="B24"/>, <sref ref="B26"/></entryReference> <entryReference>combined with writing implements <sref ref="B43K0029060000"/></entryReference> </titlePart> <titlePart> <text>with gearing</text> </titlePart> <titlePart> <text>with cranked handles</text> </titlePart> <titlePart> <text>in which the pencils or leads are sharpened by only axial movement against cutting blades</text> </titlePart> <titlePart> <text>in which the pencils or leads are sharpened mainly by rotational movement against cutting blades</text> <entryReference><sref ref="B43L0023020000"/> takes precedence</entryReference> </titlePart> <titlePart> <text>Ink receptacles</text> <entryReference>liquid receptacles in general <sref ref="B65D"/>, e.g. <sref ref="B65D0001000000"/></entryReference> </titlePart> <titlePart> <text>with separate dipping-cups</text> </titlePart> <titlePart> <text>supplied by pressure arrangements</text> </titlePart> <titlePart> <text>supplied by tilting the receptacles</text> </titlePart> <titlePart> <text>with arrangements for dissolving ink powder</text> </titlePart> <titlePart> <text>with means for holding objects</text> </titlePart> <titlePart> <text>with pen-wiping means</text> </titlePart> <titlePart> <text>Ink stands</text> </titlePart> <titlePart> <text>having means for securing objects thereon</text> </titlePart> <titlePart> <text>securable to other objects</text> </titlePart>