Fiber boxes for a concrete fiber injector

A fiber box for securing to a fiber injector for passing fiber into a material flow passing through a flow conductor and providing the fiber for injecting to the material flow, the fiber box comprising:

• an enclosure for containing said fiber for passing into the material flow;
• an aperture providing a feed hole for passing said fiber from an interior of said enclosure to an exterior of said enclosure;
• a plurality of contacts having ends disposed on a side of said enclosure, said ends being spaced apart for registering with mating contacts of the fiber injector;
• a plurality of frangible elements extending between respective ones of said contacts, said frangible element being conductive for providing electrical continuity between said two contacts;
• and
• a second end and intermediate portions of said fiber being disposed in operative relation to corresponding ones of said frangible elements, such that when said fiber is withdrawn from within said enclosure corresponding ones of said frangible elements separate and break electrical continuity between respective ones of said contacts, wherein said frangible elements are disposed in relative relation to said second end and said intermediate sections of said fiber to indicate of a proportionate amount of said fiber withdrawn from said enclosure.

A fiber box for securing to a fiber injector for passing a single fiber into a material flow passing through a flow conductor, the fiber box comprising:

• an enclosure for containing said single fiber for passing into the material flow;
• an aperture providing a feed hole for passing said single fiber from an interior of said enclosure to an exterior of said enclosure;
• a plurality of contacts having ends disposed on a side of said enclosure, said ends being spaced apart for registering with mating contacts of the fiber injector;
• a plurality of frangible elements extending between respective ones of said contacts, said frangible element being conductive for providing electrical continuity between said two contacts;
• and
• a second end and intermediate portions of said single fiber being secured to corresponding ones of said frangible elements, such that when said single fiber is withdrawn from within said enclosure a corresponding one of said frangible elements separates and breaks electrical continuity between respective ones of said contacts, wherein said frangible elements are connected to said second end and said intermediate sections of said single fiber to provide an indication of a proportionate amount of said single fiber withdrawn from said enclosure.