| 摘要 |
<p>Novel panel and panel assembly for use in building-type structures, together with panel forming apparatus which are especially suitable for using portable, point-of-use, continuously operable, roll-forming techniques. One panel disclosed is characterized by upwardly diverging inclined sidewall portions (26, 27), wing portions (28, 29) of substantial lateral extent in relation to an intermediate wall portion that forms the bottom thereof, upper inclined side sections (41, 47), and centered edge fastening structure (31, 32). Another panel is characterized by vertical upper side sections (228, 229) extending above upwardly diverging inclined sidewall portions (226, 227) and offset edge fastening seam structure (231 and 232). These panels provide a greater panel width per sheet stock width, ease of assembly, spacing and tracking surface for continuous edge seaming, and balanced strength with respect to loading. One panel assembly has continuous seam structure (54) with abutting inclined side sections (41, 47) and centered interlocking lateral flange portions (46, 53). The other panel assembly has continuous seam structure (254) with abutting vertical side sections (228, 229) and offset interlocking flange structure. The panel forming apparatus changes straight panels to curved panels and is characterized by separate, alternately operable, sidewall portion and intermediate wall portion indenting drives each having alternate idle and drive modes of operation.</p> |
