Abstract A grasping device for doffing full bobbins and reloading empty tubes in a spinning frame is disclosed, wherein two grippers provided with expansible chambers are united together and independently actuated. According to the invention, a first gripper comprises a stiff outer sleeve, an inner resiliently yielding sleeve having the ends curled over and fastened to the outside of said stiff sleeve and a couple of comparatively stiff collars snappingly engaged onto said curled ends of the resiliently yielding sleeve so as to lock them in a sealtight manner against the outer wall of said stiff sleeve. The second gripper comprises a first stiff sleeve integral with the stiff sleeve of the first gripper and equipped with a first hole for communication between a first feeding duct for a pressurized fluid and the inner cavity of said first sleeve, with a second hole for communication between a second pressurized fluid feeding duct and a widened annular portion formed in the inner cavity of said first sleeve, and with a third hole which passes also through the stiff sleeve of the first gripper, for establishing a communication between said annular widened portion and the expansible chamber defined between the two sleeves of the first gripper, the second gripper comprises also a second stiff sleeve inserted into said widened annular portion of the inner cavity of the first gripper and equipped with an annular groove for affording a communication between said second and said third hole of the first sleeve, a resiliently yielding sleeve inserted in the interior of said first and said second sleeve and equipped with ends which are curled over and fastened to the outside of said first and said second sleeve and a couple of comparatively stiff collars snappingly engaged onto said curled over ends so as to lock them in a sealtight manner against the outer wall of said stiff sleeves.
Inventors
👤 G Viglione
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-05 21:20
CPC Classifications
D; D01; D01H; D01H9/00; D01H9/001; D01H9/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
319 words
A grasping device for doffing full bobbins and reloading empty tubes in a spinning frame, of the kind comprising two grippers having chambers which can be expanded by a pressurized fluid, said grippers being united together and independently actuated, characterized in that a first gripper comprises a stiff outer sleeve, an inner resiliently yielding sleeve having the ends curled over and fastened to the outside of said stiff sleeve and a couple of comparatively stiff collars snappingly engaged onto said curled ends of the resiliently yielding sleeve so as to lock them in a sealtight manner against the outer wall of said stiff sleeve, and in that the second gripper comprises a first stiff sleeve integral with the stiff sleeve of the first gripper and equipped with a first hole for communication between a first feeding duct for a pressurized fluid and the inner cavity of said first sleeve, with a second hole for communication between a second pressurized fluid feeding duct and a widened annular portion formed in the inner cavity of said first sleeve, and with a third hole which passes also through the stiff sleeve of the first gripper, for establishing a communication between said annular widened portion and the expansible chamber defined between the two sleeves of the first gripper, a second stiff sleeve inserted into said widened annular portion of the inner cavity of the first gripper and equipped with an annular groove for affording a communication between said second and said third hole of the first sleeve, a resiliently yielding sleeve inserted in the interior of said first and said second sleeve and equipped with ends which are curled over and fastened to the outside of said first and said second sleeve and a couple of comparatively stiff collars snappingly engaged onto said curled over ends so as to lock them in a sealtight manner against the outer wall of side stiff sleeves.
Claim 2
Dependent Claim
319 words
A grasping device for doffing full bobbins and reloading empty tubes in a spinning frame, of the kind comprising two grippers having chambers which can be expanded by a pressurized fluid, said grippers being united together and independently actuated, characterized in that a first gripper comprises a stiff outer sleeve, an inner resiliently yielding sleeve having the ends curled over and fastened to the outside of said stiff sleeve and a couple of comparatively stiff collars snappingly engaged onto said curled ends of the resiliently yielding sleeve so as to lock them in a sealtight manner against the outer wall of said stiff sleeve, and in that the second gripper comprises a first stiff sleeve integral with the stiff sleeve of the first gripper and equipped with a first hole for communication between a first feeding duct for a pressurized fluid and the inner cavity of said first sleeve, with a second hole for communication between a second pressurized fluid feeding duct and a widened annular portion formed in the inner cavity of said first sleeve, and with a third hole which passes also through the stiff sleeve of the first gripper, for establishing a communication between said annular widened portion and the expansible chamber defined between the two sleeves of the first gripper, a second stiff sleeve inserted into said widened annular portion of the inner cavity of the first gripper and equipped with an annular groove for affording a communication between said second and said third hole of the first sleeve, a resiliently yielding sleeve inserted in the interior of said first and said second sleeve and equipped with ends which are curled over and fastened to the outside of said first and said second sleeve and a couple of comparatively stiff collars snappingly engaged onto said curled over ends so as to lock them in a sealtight manner against the outer wall of side stiff sleeves.