1. Patterns and Developments
Patterns are used in many types of product designs and forms of manufacturing. The packaging industry makes extensive use of patterns.

2. What is a development?
A pattern of a shape that is laid out in a single flat plane in preparation for bending to a required shape,

3. Surface Developments
Parallel Line
Radial Line
Triangulation

4. Extra material used to connect the pattern into the desired shape.
Laps and Seams
Extra material used to connect the pattern into the desired shape.

5. Single curved surface (cylinder) Double curved surface (sphere)
Plane surface (box)
Single curved surface (cylinder)
Double curved surface (sphere)

6. Parallel Line Development
All lines are parallel and perpendicular

7. Truncated Prism
Create an auxiliary view to get the true size and shape of the inclined plane.

8. Oblique Surface
Use Triangulation to get the true size and shape of the inclined surface.

9. Truncated cylinder Again create an auxiliary view
Divide the circle and project to the incline
Then project to the right side view

10. Assignment Complete the following drawings: 14-2 14-3 14-4 14-7 14-5
14-6
14-7
14-8
14-10
14-19
14-22