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)
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 85/00; stands for drawing-boards A47B 97/00)
 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 13/02; 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]

P:40 B43L 9/00
Circular curve-drawing or like instruments (compasses for drawing spirals B43L 11/00; curve rulers or templets B43L 13/20)
P:30 B43L 11/00
Non-circular-curve-drawing instruments (curve rulers or templets B43L 13/20)
P:70 B43L 12/00
Means to prevent slippage  [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 7/00)
 B43L 13/10
·  Pantographic instruments for copying, enlarging, or diminishing (arrangements for copying in machine tools B23Q)
 B43L 13/14
·  Devices for drawing in perspective
 B43L 13/20
·  Curve rulers or templets
 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 29/00; making blotting paper D21F 11/00)  [2]
P:100 B43L 19/00
Erasers, rubbers, or erasing devices; Holders therefor (rubbers or erasing knives combined with writing implements B43K 29/00)
P:80 B43L 21/00
Blackboard or slate-cleaning devices
P:110 B43L 23/00
Sharpeners for pencils or leads (grinding or cutting tools in general B24, B26; combined with writing implements B43K 29/00)  [2]
P:130 B43L 25/00
Ink receptacles (liquid receptacles in general B65D, e.g. B65D 1/00)
P:120 B43L 27/00
Ink stands