Injection molding resilient ring clip
US4277434A · kind A · utility
Inventor
Key dates
| Filing date | Jan 18, 1979 |
| Grant date | Jul 7, 1981 |
| Priority date | — |
| Expiry date | Jan 18, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/0086
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a lightweight plastic ring clip useful as an inexpensive fastening and holding device and to a method of making such ring clips by injection molding. Each ring clip is molded into a solid shape which presents the appearance of a toroid with a small gap in it resulting from an incomplete revolution of the toroid-generating closed plane curve around the toroid-generating axis of rotation. The two ends of the ring clip, which define the small gap, are each flattened on a single side for a short distance along the ring in the area around and including the tips of the ring clip ends. The two flattened areas are on opposite sides of the ring and lie in planes parallel to each other and approximately normal to the toroid-generating axis of rotation. Projecting from and approximately normal to the flattened area of one of the ring clip ends, is an integrally formed pin which will fit snugly into a hole formed in the flattened area of the other ring clip end. The ring clip may be used to secure such items as drilled or perforated literature to wire baskets for display purposes or the like, by inserting such items into the small gap, inserting one of the ring clip en…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.