Combination strapping tool for plastic strap
US3944460A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1972 |
| Grant date | Mar 16, 1976 |
| Priority date | — |
| Expiry date | Dec 14, 1992 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7276
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A manually operable combination strapping tool for applying plastic strapping around an object includes a strap-tensioning and gripping mechanism for holding the strap in a tensioned loop around the object with the supply portion of the strap overlapping the leading end thereof, and a heat sealing mechanism which comprises a cam shaft adapted for camming engagement with a movable pressure block and with a rocker arm which is in turn releasably coupled to a movable heater. As the cam shaft is rotated, the rocker arm moves the heater between the overlapping strap portions and the pressure block is moved to press together the heating element and strap portions for melting thereof. Further rotation of the cam shaft disengages it from the pressure block and decouples the rocker arm from the heater to permit retraction of the pressure block and the heater by separate bias means. Further rotation of the cam shaft again effects cammed movement of the pressure block to bond together the melted strap portions and sever the supply portion of the strap. Means limiting the pressure with which the strap and the heater are pressed together and cooling means are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.