GL A IX 8 Text matter on drawings

It should first be noted that Rule 46(2)(d) and (g) also applies to text matter on the drawings.[Rule 46(2)(d); (g); ]

For indications of the type "section on AB", see A‑IX, 7.3.1.

The drawings must not contain text matter, except, when absolutely indispens

GL A IX 7.6 Variations in proportions

Elements of the same figure must be in proportion to each other, unless a difference in proportion is indispensable for the clarity of the figure.[Rule 46(2)(f); ]

As a preferred alternative to a difference in proportion within one figure for the purpose of achieving the necessary clarity, a supplementary figure may be added giving a larger-scale illustration of the element of the initial figure.

GL A IX 7.5.5 Consistent use of reference signs as between drawings

The same features, when denoted by reference signs, must, throughout the application, be denoted by the same signs.[Rule 46(2)(i); ]

There would be considerable confusion if a single feature were allocated different reference signs in the various drawings.

GL A IX 7.5.4 Consistent use of reference signs as between description, claims and drawings

Reference signs not mentioned in the description and claims may not appear in the drawing, and vice versa.[Rule 46(2)(i); ]

Reference signs appearing in the drawing must be given in the description and the claims taken as a whole. As regards use of these signs in the claims, reference should be made to F‑IV, 4.19.

Features of a drawing should not be designated by a reference in cases where the feature itself has not been described.

GL A IX 7.5.3 Height of the numbers and letters in the drawings

Under Rule 46(2)(g), a minimum size of 0.32 cm is required for all numbers and letters used on the drawings so that their reduction in size to two-thirds remains easily legible.[Rule 46(2)(g); ]

The Latin alphabet should normally be used for letters. The Greek alphabet is to be accepted however where it is customarily used, e.g. to indicate angles, wavelengths, etc.

GL A IX 7.5.2 Arrows

Arrows may be used at the end of the leading lines provided that their meaning is clear.

GL A IX 7.5.1 Leading lines

Leading lines are lines between reference signs and the details referred to. Such lines may be straight or curved and should be as short as possible. They must originate in the immediate proximity of the reference sign and extend at least as far as the features indicated.

Leading lines must be executed in the same way as lines in the drawing, viz. in accordance with Rule 46(2)(a).[Rule 46(2)(a); ]

GL A IX 7.5 Numbers, letters and reference signs

Numbers, letters and reference signs and any other data given on the sheets of drawings, such as the numbering of figures, pages of the drawing, acceptable text matter, graduations on scales, etc., must be simple and clear, and not used in association with any brackets, inverted commas, circles or outlines whatsoever.

GL A IX 7.4 Scale of drawings

If the scale of the figure is such that all the essential details would not be clearly distinguished if the figure is reproduced, electronically or photographically, with a linear reduction in size to two-thirds, then the figure must be redrawn to a larger scale, and if necessary the figure should be split up into partial figures so that a linear reduction in size to two-thirds is still intelligible.[Rule 46(2)(c); ]

The graphic representation of the scale of drawings in cases where its inclusion is considered u

GL A IX 7.3.2 Hatching

A cross-section must be set out and drawn in the same manner as a normal view whose parts in cross-section are hatched with regularly spaced strokes, the space between strokes being chosen on the basis of the total area to be hatched.[Rule 46(2)(b); ]

Hatching should not impede the clear reading of the reference signs and leading lines. Consequently, if it is not possible to place references outside the hatched area, the hatching may be broken off wherever references are inserted.