Importance

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Abstract

A lumber piece conveyor including a conveyor chain having retaining lugs and overhead rollers for pressing the lumber pieces on to the retaining lugs. The overhead rollers independently descend and retract as the logs approach the rollers in sequence. The retracted position of each roller is established by the prior roller's position of initial engagement with a log. The retracted position can thus be established at a substantially consistent distance above the point of engagement regardless of the log diameter. Preferably a linkage has one end that is connected to the roller movement of a prior roller assembly and the other end dictates the pivotal positioning of a proximity switch. As the prior roller is moved into engagement, the linkage pivots the proximity switch. The proximity switch signals a computer that the subsequent roller is too high or too low and the roller is accordingly lowered or raised to the desired retracted position.

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First Claim