Cutting – With product handling means – Means to move – guide – or permit free fall or flight of product
Patent
1992-11-23
1994-05-24
Seidel, Richard K.
Cutting
With product handling means
Means to move, guide, or permit free fall or flight of product
82 531, 83 54, 83318, 83337, B26D 118
Patent
active
053138627
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an apparatus for cutting cylindrical sleeves during the continuous displacement of the sleeve in its longitudinal direction, for example in connection with continuous manufacture of the sleeve in an appropriate machine, the apparatus including a longitudinal slide which is displaceable synchronously with the sleeve during its rotation and movement in the longitudinal direction, and which is provided with a knife which is impressible into the wall of the sleeve during the rotation and longitudinal displacement of the longitudinal slide and the sleeve.
There are many prior art apparatuses of the above-disclosed type for cutting sleeves for use in, for example, the papermaking industry. The sleeves may advantageously be manufactured in direct association with the cutting apparatus by alternating helical windings of paper and/or cardboard webs on a support pipe to the desired material thickness of the sleeve. The finished sleeve is often fed direct into a cutting apparatus and, therefore, as a rule has not completely dried when cutting is to take place, but displays a certain degree of softness. Naturally, this places stringent and special requirements on the cutting apparatus which must execute the cutting operation during the rotation and continuous longitudinal displacement of the sleeve without any unacceptable deformation of the end of the sleeve or the incision surface itself. The prior art apparatuses are of extremely complex design and construction, entailing many drawbacks in the form of operational downtime, sleeve rejection, etc.
The task forming the basis of the present invention is to improve prior art cutting apparatuses for achieving more rational sleeve cutting than hitherto, this moreover without resulting in any deterioration in the desired quality of the incision face.
This task is solved according to the present invention in the apparatus disclosed by way of introduction, in that the knife is mounted on a cross slide which is reciprocal transversely of the longitudinal direction of the sleeve and, thereby, transversely of the direction of movement of the longitudinal slide for urging the knife into the wall of the sleeve for cutting a desired length of the sleeve. The cross slide has a forward, knife-carrying section and a rear section guiding the reciprocal movement during the longitudinal displacement, these sections being interconnected by means of a piston and cylinder assembly, partly for fixing the mutual position of the sections, and partly for mutually displacing the sections to and away from one another. The sections are mounted on a number of rails for the movement transversely of the longitudinal axis of the sleeve, and the rear section has a guide pin which extends into a guide groove along the sleeve and is displaced reciprocally in the guide groove during the movement of the longitudinal slide synchronously with the sleeve and back to its starting position. The forward section displays an arm which, at its free end, carries a freely rotatable knife and, at its opposing end, is longitudinally displaceably mounted on the forward section, whereby the free portion of the arm, outside the forward section, is adjustable for adaptation to different diameters of the sleeve. The longitudinal slide is coupled to an end arm by means of a rod which extends along the sleeve, and the distance between the longitudinal slide and the end arm is adjustable in response to the desired length of the cut sleeve, a piston and cylinder assembly being disposed between a fixed portion in the apparatus and the longitudinal slide in order to cooperate in the displacement thereof with the sleeve and in order to return the slide and end arm to their starting positions after the cutting operation. The end arm is pivotal away from the end of the sleeve by means of a piston and cylinder assembly. On either side of the sleeve, there are disposed support rollers which are mounted on pivotal arms for rolling off a cut sleeve in either direction. The longitudinal slide is provided
REFERENCES:
patent: 1643994 (1927-10-01), Parsons
patent: 3044336 (1962-07-01), Bock
patent: 3540333 (1970-11-01), Johnson
patent: 4299147 (1981-11-01), Rogers
patent: 4591405 (1986-05-01), Languillat
patent: 4756217 (1988-07-01), Holmes
patent: 4823579 (1989-04-01), Castricum
Core Link AB
Peterson Kenneth E.
Seidel Richard K.
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