18,519
edits
Backpack: Difference between revisions
Jump to navigation
Jump to search
m
Robot: Automated text replacement (-metal +metal)
m (Robot: Automated text replacement (-20th century +20th century); cosmetic changes) |
m (Robot: Automated text replacement (-metal +metal)) |
||
| Line 24: | Line 24: | ||
The more traditional type uses a rigid, ''external frame'' which is strapped on the back and in turn carries and supports a cloth sack and potential strapped on items. Wooden pack frames have been used for centuries around the world,{{Fact|date=February 2007}} and metal versions first appeared in the mid-20th century. Modern pack frames are usually made from lightweight [[aluminium]] tubes. The frame typically has a system of straps and pads to keep the sack and the frame from contacting the body. The open structure has the added benefit of improved ventilation and decreased sweatiness. The fabric part of the pack occupies part of the frame's length, but the frame typically protrudes above and below. These areas of the frame allow bulky items (such [[tent]]s, [[sleeping bag]]s, and [[thermal pad]]s) to be strapped on. Thus the main compartment is smaller than that of an internal-frame pack, because bulky items ([[tent]]s, [[sleeping bag]]s, [[thermal pad]]s) are strapped to the parts of the frame not occupied by the main compartment itself. | The more traditional type uses a rigid, ''external frame'' which is strapped on the back and in turn carries and supports a cloth sack and potential strapped on items. Wooden pack frames have been used for centuries around the world,{{Fact|date=February 2007}} and metal versions first appeared in the mid-20th century. Modern pack frames are usually made from lightweight [[aluminium]] tubes. The frame typically has a system of straps and pads to keep the sack and the frame from contacting the body. The open structure has the added benefit of improved ventilation and decreased sweatiness. The fabric part of the pack occupies part of the frame's length, but the frame typically protrudes above and below. These areas of the frame allow bulky items (such [[tent]]s, [[sleeping bag]]s, and [[thermal pad]]s) to be strapped on. Thus the main compartment is smaller than that of an internal-frame pack, because bulky items ([[tent]]s, [[sleeping bag]]s, [[thermal pad]]s) are strapped to the parts of the frame not occupied by the main compartment itself. | ||
An ''internal-frame'' pack has a large cloth part in which a small frame is integrated. This frame can consist of strips of either a | An ''internal-frame'' pack has a large cloth part in which a small frame is integrated. This frame can consist of strips of either a metal or specially designed [[polymer]] that molds to one's back to provide a good fit. Usually a complex series of straps works with the frame to distribute the weight and hold it in place. Internal-frame packs may provide a few lash points, but as the frame is fully integrated and not available on the outside, it is difficult to lash a large, heavy item so that it stays fixed and does not bounce, so most cargo must fit inside. | ||
Internal-frame packs originally suffered from smaller load capacity and less comfortable fit during steady walking, but newer models have improved greatly in these respects. In addition, because of their snug fit, they ride better in activities that involve upper-body movement; such as scrambling over rocky surfaces. The improved internal frame models have largely replaced external frame backpacks. In Europe hardly any external-frame models are sold anymore, but in the United States, some manufacturers continue to produce them. | Internal-frame packs originally suffered from smaller load capacity and less comfortable fit during steady walking, but newer models have improved greatly in these respects. In addition, because of their snug fit, they ride better in activities that involve upper-body movement; such as scrambling over rocky surfaces. The improved internal frame models have largely replaced external frame backpacks. In Europe hardly any external-frame models are sold anymore, but in the United States, some manufacturers continue to produce them. | ||