Parallel belted clamp
AssigneeLantech, Inc.
InventorWilliam G. Lancaster
Life of this patent
Estimating the term…
Abstract
A clamp for clamping a web during stretch wrapping includes a first longitudinally extending clamp element for engaging the web, a second longitudinally extending clamp element extendable in a direction generally parallel to the longitudinal direction of the first clamp element for clamping the web between the second clamp element and the first clamp element as the second clamp element is longitudinally extended in a direction parallel to the longitudinal direction of the first clamp element.
Claims50
A clamp comprising:
- a first longitudinally extending clamp means including first contact means for contacting a workpiece;
- a second longitudinally extending clamp means extendable in a direction parallel to the longitudinal direction of the first clamp means, the second clamp means including second contact means opposed to the first contact means for contacting the workpiece, the second contact means being supported by a remaining portion of the second clamp means and movable in the longitudinal direction relative to the remaining portion of the second clamp means while being fixed relative to the first contact means for clamping a workpiece between the second contact means and the first contact means as the remaining portion of the second clamp means is longitudinally extended in a direction parallel to the longitudinal direction of the first clamp means.
Apparatus for clamping a web and wrapping a load with the web comprising:
- means for dispensing the web;
- means for rotating the load relative to the dispenser means to wrap the web on the load;
- and
- means for clamping the web including a first longitudinally extending clamp means having first contact means for contacting the web, a second longitudinally extending clamp means extendable in a direction generally parallel to the longitudinal direction of the first clamp means, the second clamp means including second contact means opposed to the first contact means for contacting the workpiece, the second contact means being supported by a remaining portion of the second clamp means and movable in the longitudinal direction relative to the remaining portion of the second clamp means while being fixed relative to the first contact means for clamping the web between the second contact means and the first contact means as the remaining portion of the second clamp means is longitudinally extended in a direction parallel to the longitudinal direction of the first clamp means.
A method for clamping a web and wrapping a load with a web comprising:
- positioning a load in a position to be wrapped;
- rotating the load relative to a web dispenser to wrap the web on the load;
- extending a first longitudinally extending clamp element along its longitudinal direction into the wrapping path of the web;
- passing the web over the first clamp element and contacting the web with a contact portion of the first clamp element;
- and
- extending a second longitudinally extending clamp element along its longitudinal direction in a direction parallel to the first clamp element and contacting the web with a contact portion of the second clamp element while moving the contact portion of the second clamp element in the longitudinal direction relative to a remaining portion of the second clamp element but maintaining the contact portion of the second clamp element fixed relative to contact portion of the first clamp element to clamp the web between the contact portions of the first and second clamp elements as the remaining portion of the second clamp element is longitudinally extended in a direction parallel to the longitudinal direction of the first clamp element.
Dependencies are inferred from the claim text.