"Indicating ""staples low"" in a paper stapler"
US5441191A · kind A · utility
Inventor
Key dates
| Filing date | Dec 30, 1993 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Dec 30, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25C5/1689
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A paper stapler is provided with a pin that protrudes from the front end of the magazine when the stapler is low on staples. The pin is distinctively colored (e.g., red), to visually alert the user to the fact that the magazine will soon need to be loaded with a fresh supply of staples. Alternatively, when the stapler is low on staples, the top surface of the top housing of the stapler is deformed, when a button-like element that is otherwise flush with the top surface begins to extend above the top surface. This provides the user with a tactile cue that the stapler is low on staples. Both tactile and visual cues can be provided to the user indicative of the fact that there is a relatively low number of staples remaining in the magazine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.