B - Operations – Transporting – 65 – G
Patent
B - Operations, Transporting
65
G
270/68
B65G 57/06 (2006.01)
Patent
CA 1124271
ABSTRACT OF THE DISCLOSURE Articles which nest, such as baking pans, are assembled into a stack by a two-stage lift mechanism in which the assembly of a second stack is commenced while a previously assembled first stack is being discharged from the stack form- ing apparatus, so that the flow of pans into the apparatus need not be interrupted. Articles such as pans are fed in succession into a stacking station at which the articles are aligned with a vertical path and then dropped. A first stage lift receives the articles and is lowered one step upon the receipt of each article until the first stage lift is lowered to a transfer station. At the transfer station, support of the stack of articles is transferred to a second stage lift which is similarly lowered one step upon the addition of each subsequent article to the stack until a preselected number of articles have been accumulated in the stack. Upon transferring the support of the stack to the second stage lift, the first stage lift is retracted clear of the stack and returned to its upper limit of movement. When the final article has been stacked on the second stage lift, the first stage lift is re- inserted into the vertical path to receive the next following article to commence assembly of a second stack. Simultaneously, the second stage lift is lowered to a discharge station where the stack is discharged from the second stage lift which in then elevated back to the transfer station. The stacker is capable of stacking both bread and bun pans, which are of different height and capable of delivering pans to a discharge conveyor without stacking them.
386535
Baker John R.
Cournoyer George R.
Woody Robert E.
Baker Perkins Inc.
Ridout & Maybee Llp
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