B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
 B01 - 
B07
Subsection index
LIQUID/LIQUID, LIQUID/GAS OR GAS/GAS SEPARATION
Method
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/LIQUID OR SOLID/GAS SEPARATION
Method
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/SOLID SEPARATION
Method
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB07B
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
Apparatus
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB04B, B04C
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
  
PRINTING
 B43
WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
 B43L
ARTICLES FOR WRITING OR DRAWING UPON; ACCESSORIES FOR WRITING OR DRAWING (workshop equipment for marking-out work B25H 7/00; teaching hand-writing or drawing G09B 11/00)
 B43L

Note(s)

This subclass does not cover devices used for both teaching and facilitating writing or drawing, which are covered by group G09B 11/00.  [3]

 B43L
Subclass index
ARTICLES FOR WRITING OR DRAWING UPON
Boards or tablets 1/00
Underlays 3/00
Drawing-boards 5/00
AIDS FOR DRAWING
Straight lines 7/00
Circles 9/00
Other curves 11/00
Means to prevent slippage 12/00
Other figures 13/00
ATTACHMENT TO HANDS OR ARMS 15/00
BLOTTERS 17/00
ACCESSORIES FOR
Rubbing or erasing 19/00
Cleaning blackboards or slates 21/00
Sharpening pencils or leads 23/00
INK RECEPTACLES; INK STANDS 25/00; 27/00
 B43L 1/00 - 
B43L 5/00
Articles for writing or drawing upon
P:0 B43L 1/00
Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L 5/00)
 B43L 1/02
·  Slates
 B43L 1/04
·  Blackboards (easels or stands for blackboards A47B 97/04)
 B43L 1/06
·  ·  rigid
 B43L 1/08
·  ·  flexible
 B43L 1/10
·  ·  Writing surfaces thereof
 B43L 1/12
·  having translucent writing surfaces producing visual impressions by co-operation with backing members
P:20 B43L 3/00
Writing or drawing-underlays, e.g. blotting pads (blotters B43L 17/00)
P:10 B43L 5/00
Drawing-boards (drawing-desks or tables A47B 27/00, A47B 85/02; stands for drawing-boards A47B 97/04)
 B43L 5/02
·  having means for clamping sheets of paper thereto (drawing-pins B43M 15/00)
 B43L 7/00 - 
B43L 27/00
Writing or drawing aids
P:50 B43L 7/00
Straightedges (guides for rulers other than for T-squares B43L 13/04; curve rulers or templets B43L 13/20; 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, G01B)
 B43L 7/00

Note(s)

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.  [5]

 B43L 7/02
·  T-squares
 B43L 7/027
·  Plural non-adjustable straightedges fixed at right angles (B43L 7/02 takes precedence)  [5]
 B43L 7/033
·  Plural non-adjustable straightedges forming non-right angles  [5]
 B43L 7/04
·  with rollers (with interconnected rollers B43L 13/02)
 B43L 7/08
·  with arrangements for attaching additional drawing equipment, e.g. for hatching, dotting
 B43L 7/10
·  Plural straightedges relatively movable  [5]
 B43L 7/12
·  ·  Square and pivoting straightedges  [5]
 B43L 7/14
·  ·  Square and sliding straightedges  [5]
P:40 B43L 9/00
Circular curve-drawing or like instruments (curve rulers or templets B43L 13/20)
 B43L 9/02
·  Compasses (proportional compasses B43L 9/08; compasses for drawing spirals B43L 11/06)
 B43L 9/04
·  ·  Beam compasses
 B43L 9/06
·  ·  with legs formed by flat springs
 B43L 9/08
·  Proportional compasses or dividers
 B43L 9/10
·  ·  with arrangements for drawing polygons
 B43L 9/12
·  Dividers (proportional dividers B43L 9/08)
 B43L 9/14
·  with changeable leg-ends for conversion into compasses, dividers, or callipers (B43L 9/24 takes precedence)
 B43L 9/16
·  Features common to compasses, dividers, or callipers
 B43L 9/18
·  ·  Legs with toggle joints
 B43L 9/20
·  ·  Pivots
 B43L 9/22
·  ·  Leg-angle adjusting-means separate from pivots
 B43L 9/24
·  ·  Means for mounting points or writing appliances on legs
P:30 B43L 11/00
Non-circular-curve-drawing instruments (curve rulers or templets B43L 13/20)
 B43L 11/02
·  for drawing conic sections
 B43L 11/04
·  ·  for drawing ellipses
 B43L 11/045
·  ·  ·  with cords or like flexible elements  [5]
 B43L 11/05
·  ·  ·  with gears  [5]
 B43L 11/055
·  ·  ·  with guides  [5]
 B43L 11/06
·  for drawing spirals
 B43L 11/08
·  for drawing involutes
P:70 B43L 12/00
Means to prevent slippage  [5]
 B43L 12/02
·  magnetic  [5]
P:140 B43L 13/00
Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (stencils for surface decoration B44D)
 B43L 13/02
·  Drafting machines or drawing devices for keeping parallelism (T-squares B43L 7/02)
 B43L 13/04
·  ·  Guides for rulers
 B43L 13/06
·  ·  ·  with pivoted guide rods
 B43L 13/08
·  ·  Protractor heads
 B43L 13/10
·  Pantographic instruments for copying, enlarging, or diminishing (arrangements for copying in machine tools B23Q)
 B43L 13/12
·  ·  Multiple writing devices
 B43L 13/14
·  Devices for drawing in perspective
 B43L 13/16
·  ·  free-hand
 B43L 13/18
·  ·  ·  having optical or projecting equipment (optical systems or apparatus G02B; projectors G03B)
 B43L 13/20
·  Curve rulers or templets
 B43L 13/22
·  ·  Adjustable curve rulers
 B43L 13/24
·  Devices for generating stepwise movements of drawing equipment, e.g. for hatching
P:60 B43L 15/00
Supports for attachment to hands or arms for facilitating writing or drawing
P:90 B43L 17/00
Blotters (blotting pads B43L 3/00; combined with writing implements B43K 29/04; making blotting paper D21F 11/14)  [2]
 B43L 17/02
·  for blotting-paper sheets
 B43L 17/04
·  ·  hand-held
 B43L 17/06
·  for reeled blotting-paper
 B43L 17/08
·  ·  Roller blotters
 B43L 17/10
·  using blotting material other than paper
P:100 B43L 19/00
Erasers, rubbers, or erasing devices; Holders therefor (rubbers or erasing knives combined with writing implements B43K 29/02, B43K 29/18)
 B43L 19/02
·  Erasing knives (knives in general B26B)
 B43L 19/04
·  Fibrous erasers
P:80 B43L 21/00
Blackboard or slate-cleaning devices
 B43L 21/02
·  with means for absorbing the chalk dust
 B43L 21/04
·  Wiper holders
P:110 B43L 23/00
Sharpeners for pencils or leads (grinding or cutting tools in general B24, B26; combined with writing implements B43K 29/06)  [2]
 B43L 23/02
·  with gearing
 B43L 23/04
·  ·  with cranked handles
 B43L 23/06
·  in which the pencils or leads are sharpened by only axial movement against cutting blades
 B43L 23/08
·  in which the pencils or leads are sharpened mainly by rotational movement against cutting blades (B43L 23/02 takes precedence)
P:130 B43L 25/00
Ink receptacles (liquid receptacles in general B65D, e.g. B65D 1/00)
 B43L 25/02
·  with separate dipping-cups
 B43L 25/04
·  ·  supplied by pressure arrangements
 B43L 25/06
·  ·  supplied by tilting the receptacles
 B43L 25/08
·  with arrangements for dissolving ink powder
 B43L 25/10
·  with means for holding objects
 B43L 25/12
·  with pen-wiping means
P:120 B43L 27/00
Ink stands
 B43L 27/02
·  having means for securing objects thereon
 B43L 27/04
·  securable to other objects