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When canopies were packed into early bag-type containers, they always wanted to assume a spherical or round shape. For the container to remain flat, it was necessary to tailor the fabric and then use frames or bow stiffeners to keep it flat and compress the pilot chute. Back designs utilized multiple cones and pins, usually three or four to usually more square and thicker since they were held in place by the seat pan. Most use two cones and pins for closing. The same was used for chest and lapparachutes. Many military systems still utilize these basic configurations today.\ With the introduction of skydiving in the 1960s, most equipment was of modified military designs, and the first generation of commercial products were simply colored versions of these designs. In the 1970s, skydiving canopies had progressed to ram-air designs, which were smaller in volume and had different deployment requirements. Container designs evolved to meet these requirements.

The introduction of the hand deploy pilot chute was probably the most influential concept in the evolving container design. Cones were replaced by fabric closing loops, and main ripcords and pins were replaced by hand deploy bridles and locking pins. It was no longer necessary to compress the spring-loaded pilot chute inside the container. Thru closing loops were used to compress the pack and make it thinner to conform to the body shape. The use of deployment bags and other devices helped provide shaping to the container. This was true for both square and round canopies.

Today, most modern container designs have completely done away with frames and bow stiffeners. This has resulted in smaller, more flexible, more comfortable, and more efficient container designs. Instead of metal stiffeners, nylon plastic is used to reinforce the container flaps for backing the grommets. The nylon is lighter, easier to work with, and cheaper. Many of the modern military.

Figure 2-8. Modern military container