Abstract: An arm and cradle apparatus is disclosed for receiving empty trays from an upper conveyor having empty lettuce holding and transporting trays, lowering the received empty tray to an angular disposition in which it can most conveniently be packed, and finally off loading the packed full tray to a lower conveyor having full lettuce holding trays thereon for plunging to cartons. The arm and cradle apparatus is mechanically passive in that all movements of the trays to and from the arm and cradle apparatus are either worker assisted or occur under the natural gravity biased movement of the arm and cradle apparatus.

Abstract: A lettuce head holding tray is defined in which both the upper tray layer and the lower tray layer are packed side-by-side at packing stations. At a carton loading station, two side-by-side arrays of plungers each are used for packing of discrete layers of the cartons. One array of plungers packs the bottom carton layer; the other array of plungers packs the top carton layer. Two cartons are disposed opened upwardly to the plunger array at the packing station; one carton is disposed to the bottom layer loading plunger array for packing of the bottom layer and the other carton--with its bottom layer previously packed--is disposed to the top layer loanding plunger array for packing of its top layer. The cartons--between the packing of the bottom layer and the packing of the top layer--are conveyed between positions underlying the plunger arrays. Thus each carton has is lower layer packed by the lower layer loading plunger array and then its top layer packed by the upper layer loading plunger array.

Abstract: A lettuce packing machine for the packing of heads of lettuce in corrugated, carboard cartons is disclosed. A lettuce head holding tray is loaded with lettuce. Thereafter, the tray is utilized to pack cartons. The lettuce head holding trays has discrete lettuce receiving cells upwardly exposed. Each tray contains four columns of cells, each column of cells being three wide for a capacity of 12 heads of lettuce. Each discrete lettuce receiving cell in the tray is defined by four semirigid, flexible sides, which sides extend downwardly and inwardly, are elastically biased and form an inverted pyramid-like profile truncated at an open bottom. The lettuce head holding tray is loaded at a picking station and conveyed to a packing station. When the lettuce head holding tray arrives at the packing station, a packing apparatus having discrete plungers--one for each cell--unloads the tray overlying a box to be packed.

Abstract: A machine for transplanting soil plugs with great uniformity and a minimum of manual labor comprising a conveyor having a plurality of soil plug gripping mechanisms mounted thereto, a furrow opening device, and a furrow closing device. The furrow closing device of the present invention is preferably defined by portions of a bed shaper that operates to form the soil into a trapezoidal planting bed. In addition to the normal function of shaping the bed, the bed shaper establishes a ground level with respect to which the plugs are planted, while the rear portions of the bed shaper act to close the furrow, and include adjustable tabs that may be set to control the timing of the closure relative to the plug positioning. Each plug gripping assembly preferably comprises a center opening clip having opposed resilient fingers.

Abstract: An improved photocontrol system for electrical lamps comprising the combination of photoelectric means responsive to the intensity of the ambient light for controlling the turning the lamps on and off, and an electronic timer for turning off the lamps at a preset time interval, after they have been turned on.