One sheet of drawings may contain several figures. Where figures on two or more sheets form in effect a single complete figure, the figures on the several sheets must be so arranged that the complete figure can be assembled without concealing any part of any of the figures appearing on the various sheets.
PCT AG I 5.139
Partial figures drawn on separate sheets must always be capable of being linked edge to edge, that is to say, no partial figure may contain parts of another partial figure. A very long figure may be divided into several parts placed one above the other on a single sheet. However, the relationship between the different parts must be clear and unambiguous. It is therefore recommended that a smaller scale figure be included showing the whole formed by the partial figures and indicating the positions of the parts shown.