Machine for producing bodies of conical receptacles

• US 4,398,904 A
• Filed: 02/27/1981
• Issued: 08/16/1983
• Est. Priority Date: 07/02/1979
• Status: Expired due to Fees

• Current Assignee: Inlands AB Stromsvattenratt 1 1 S-463 00 Lilla EDET
• Original Assignee: Inlands AB
• Inventors: Fagerberg, Eric W.
• Primary Examiner(s): Coan, James F.
• Application Number:
  US06/243,905
• Time in Patent Office: 900 Days
• Field of Search: 493/296, 493/303, 493/299, 493/155, 493/112
• US Class Current: 493/296
• CPC Class Codes: B29C 53/60 using internal forming surfaces, e.g. mandrels
• CPC Class Codes: B31C 7/02 Forming truncated cones
• CPC Class Codes: B65D 3/06 essentially conical or frusto-conical

Abstract

A machine for winding conical bodies of receptacles in a helical manner around a conical, rotating shaping member using webs of waste paper is disclosed.

Claims

1. A machine for producing the bodies of conical receptacles having an inner annular bottom shoulder, said machine comprising

a rotatably driven shaping member having a conical jacket face,

a frame supporting a web of material in the form of a narrow strip wound into a roll, which web is intended to be used to form the conical bodies of the receptacles by being wound about the shaping member,

a device adapted to releasably secure the starting end of the web of material to the smaller end of the shaping member, and

a device to effect axial displacement of the shaping member relative to the support frame during the rotation of the shaping member for the purpose of winding the web of material in helical winding turns around the conical jacket face of the shaping member while ensuring that the discrete winding turns only partly overlap in this area and adhere to each other by means of an adhesive,

a cylindrical portion provided at the smaller end of the shaping member the diameter of which portion is slightly smaller than the smallest diameter of the conical jacket face of the shaping member, characterized in that

a guide lid is arranged to be moved towards the smaller end of the shaping member so as to cover said end for the purpose of guiding the web of material while the latter is being wound onto the shaping member,

that a pair of clamping jaws are arranged at the smaller end of the shaping member, one of the jaws being stationary while the other one is arranged for displacement towards and away from the stationary jaw to clamp the starting end of the web of material to the shaping member,

that a slit is provided in the cylindrical portion of the smaller end of the shaping member, which slit is open towards the smaller end of the shaping member so as to allow reception of the starting end of the web,

and a feeder arm arranged to introduce into the slit said starting web end to be clamped between the jaws.

2. A machine as claimed in claim 1, characterised in that at its free end the web feeder arm is provided with a pair of scissors for severing the web of material transversely, and with means for releasably securing the starting end of the web while the web feeder arm is pulling the web end towards said jaws.

3. A machine as claimed in claim 1, characterised in that an abutment means (e.g. a set screw) is provided on said web feeder arm, said means arranged, in the initial stage of the axial displacement of the shaping member, in which stage a locking pawl retains the movable jaw in a position spaced from the stationary jaw against the section of a spring, to push aside the locking pawl in order to allow the movable jaw to clamp the starting end of the web of material against the stationary jaw.

4. A machine as claimed in claim 3, characterised in that the guide lid is provided with a displaceable piston arranged in its operative position to displace the movable jaw away from the stationary jaw to a position wherein the locking pawl releasably retains the movable jaw in the neutral position thereof against the action of the spring.

5. A machine as claimed in claim 1, characterised in that the shaping member is arranged to be pushed through a stationary annular member the internal diameter of which only slightly exceeds the external diameter of the shaping member at the larger end of the latter, whereby upon return movement of the shaping member to its original position the larger end of the shaping member will abut against said annular member, thus causing the completed receptacle supported on the shaping member to be pushed axially off the latter at the smaller shaping member end.