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    • 17. 发明授权
    • Mobile thermoforming apparatus and method
    • 移动热成型设备和方法
    • US3738059A
    • 1973-06-12
    • US3738059D
    • 1971-09-30
    • HAVILAND AGRICULTURAL CHEM CO
    • HAVILAND JBALKEMA C
    • A01G13/02B29C53/04
    • A01G13/0287B29C53/043B29L2031/70
    • Thermoforming apparatus and method for continuously thermoforming a continuous web or sheet into a self-supporting, protective crop cover, preferably hat-shaped in cross-sectional configuration. The apparatus utilizes counter-rotating forming means, specifically sets of wheels on two adjacent axles, each set having primary forming wheels fixed to the axle and cooperative idler forming wheels freely rotating thereon, each idler wheel cooperating with a primary wheel on the opposing axle. Heat is supplied to the forming means, preferably by circulation of heated fluid. Forming pressure is supplied by shifting the forming means into cooperative relationship. Such a crop cover is continuously formed by simultaneously heating and bending the sheet or web material into the configurated shape, and is continuously positioned over the row as formed, and anchored by pushing dirt onto its flanged edges.
    • 热成型设备和方法,用于将连续的卷材或片材连续地热成型为自支撑的保护性作物覆盖物,优选为帽状的横截面构造。 该装置采用反向旋转成形装置,特别是在两个相邻轴上的组合轮,每组具有固定到车轴上的主要成形轮和在其上自由旋转的协作惰轮形成轮,每个惰轮与相对轴上的主轮配合。 优选通过加热流体的循环将热量供给到成形装置。 通过将成形装置转换成协作关系来提供成形压力。
    • 18. 发明授权
    • Mobile thermoforming apparatus
    • 移动热成型设备
    • US3661481A
    • 1972-05-09
    • US3661481D
    • 1970-03-02
    • HAVILAND AGRICULTURAL CHEMICAL
    • HAVILAND JAMES B JRBALKEMA CHARLES R
    • A01G13/02B29C53/04B29C17/02
    • A01G13/025B29C53/043B29L2031/70
    • Thermoforming apparatus and method for continuously thermoforming a continuous web or sheet into a self-supporting, protective crop cover, preferably hat-shaped in cross-sectional configuration. The apparatus utilizes counter-rotating forming means, specifically sets of wheels on two adjacent axles, each set having primary forming wheels fixed to the axle and cooperative idler forming wheels freely rotating thereon, each idler wheel cooperating with a primary wheel on the opposing axle. Heat is supplied to the forming means, preferably by circulation of heated fluid. Forming pressure is supplied by shifting the forming means into cooperative relationship. Such a crop cover is continuously formed by simultaneously heating and bending the sheet or web material into the configurated shape, and is continuously positioned over the row as formed, and anchored by pushing dirt onto its flanged edges.
    • 热成型设备和方法,用于将连续的卷材或片材连续地热成型为自支撑的保护性作物覆盖物,优选为帽状的横截面构造。 该装置采用反向旋转成形装置,特别是在两个相邻轴上的组合轮,每组具有固定到车轴上的主要成形轮和在其上自由旋转的协作惰轮形成轮,每个惰轮与相对轴上的主轮配合。 优选通过加热流体的循环将热量供给到成形装置。 通过将成形装置转换成协作关系来提供成形压力。