Abstract: In a can seamer, after a control mode of a drive motor has been switched to a type-changing mode, if an action button is depressed, in response to signals issued from a rotational position sensor, the drive motor moves can seaming mechanisms one pitch by one pitch via a center shaft and stops at predetermined positions. At the stopped position, an actuator is operated to depress the top end of a seaming roll shaft. By this operation, a gap clearance is formed between a rotary frame and a seaming lever. When seaming rolls are dismounted and replaced, the seaming lever connected with a seaming chuck via a bracket is removed, and thereby a type-changing work can be carried out. In addition, in the type-changing work of the can seamer, the vertical positional adjustment in a fitting between a seaming lever and seaming rolls is easily carried out. Furthermore, the knock-out pad can be replaced in a one-touch operation.

Abstract: The present invention provides a can feeding apparatus for a can seamer, in which can bodies are fed to a seaming turret are slid on a plate rail and alongside opposed guides by fingers of a drive chain. The seaming turret or a turret opposed to the seaming turret, or both turrets, are provided with claws at their outer circumferential portions. The claws project radially outwardly of pitch circles of the turrets and these projecting portions have profiles of cycloids so that the turrets will not pierce the can bodies. A plate-shaped magnet and/or a brush are disposed on the guides to steady the can bodies as they are transferred to a can lifter of the seaming turret. Furthermore, the angular position of a conveyor sprocket of the can feed conveyor can be adjusted easily in a short period of time by a phase adjusting device. Still further, in a can lid feeder disposed in front of the can seamer, a can body centering turret is also provided with projecting portions having profiles of cycloids.

Abstract: In a can seamer, after a control mode of a drive motor has been switched to a type-changing mode, if an action button is depressed, in response to signals issued from a rotational position sensor, the drive motor moves can seaming mechanisms one pitch by one pitch via a center shaft and stops at predetermined positions. At the stopped position, an actuator is operated to depress the top end of a seaming roll shaft. By this operation, a gap clearance is formed between a rotary frame and a seaming lever. Then seaming rolls are dismounted and replaced. The seaming lever connected with a seaming chuck via a bracket is removed, and thereby a type-changing work can be carried out. In addition, in the type-changing work of the can seamer, the vertical positional adjustment in a fitting between a seaming lever and seaming rolls is easily carried out. Furthermore, the knock-out pad can be replaced in a one-touch operation.

Abstract: The known can seamer is improved so that replacement and adjustment of seaming rolls, a seaming chuck and a knock-out pad may be facilitated at the time of type-change work or the like in a can seamer. In the improved can seamer, after a control mode of a drive motor has been switched to a type-changing mode, if an action button is depressed, in response to signals issued from a rotational position sensor, the drive motor moves can seaming mechanisms one pitch by one pitch via a center shaft and makes them stop at predetermined positions. At the stopped position, an actuator is operated to depress the top end of a seaming roll shaft. By this operation, a gap clearance is formed between a rotary frame and a seaming lever, then seaming rolls and are mounted, also the seaming lever connected with a seaming chuck via a bracket is removed, and thereby a type-changing work can be carried out.