Secondly, in software, using CAD for coloring is the slowest method, and its application scope is limited, so it can't handle some complicated graphics and its efficiency is very low. Therefore, it is suggested to use vector graphic design software, such as Inkscape, Affinity Designer and Illustrator. Note that what we are talking about here is vector graphic design software, not pixel graphic design software such as PS. PS is useless at all
Thirdly, you should also know some 3D software, such as 3ds Max, Rhino, UG, solidworks, etc., because sometimes customers provide objects, and you have to draw the objects into 3D drawings, and then use shading lines to export line drawings. In addition, some diagrams need to be opened and closed, which requires three-dimensional operation.
How to add shadow lines requires some sketching knowledge, such as light and shade relationship, structural relationship, basic modeling, perspective relationship and so on. , and others do, such as plane equidistant hatching, gradually widening hatching on the surface, dotted hatching on the corner.
Therefore, it is a systematic learning project to draw the shadow lines of American patents well. It takes constant practice to draw better and faster.
There are also dotted lines in the U.S. patent map. The main purpose of using dotted lines is to help explain the design. It is mainly used in two parts, one is to indicate the structural environment used in design, and the other is to indicate the boundary protected by design claims.
For example, the text in the following figure is my contact information, which does not need protection and can be made into a dotted line.
You can also ask me for drawings. I specialize in American patent drawings. Please refer to the attached drawings for details.