Claims
- 1. Apparatus for cutting web material transversely to form sections of the web material which comprise a blade formed with a linear cutting edge, final advancing means for advancing the web material a section at a time adjacent to the linear cutting edge, final clamping means for clamping the advanced web material in advance of the edge with the sections projecting beyond the edge in turn, a linear guide parallel with the edge, a mounting movable to and fro along the linear guide, a blade carried by the mounting and formed with a circular peripheral cutting edge positioned to overlap the linear cutting edge, in web-material cutting association therewith, and a drive for moving the mounting to and fro along the guide in a continuous cyclic movement in which the mounting is moved in a first direction to a first reversal position, reversed in its motion, moved in the opposite direction to a second reversal position and again reversed in its motion for further movement in said first direction, said final advancing and said final clamping means being operable to advance a section of the web material when the mounting is in the region of its reversal positions and to clamp the web material when the mounting is moving to or fro over an intermediate part of its motion between the reversal positions, said blades cooperating to cut the web material transversely during each intermediate part of the cyclic movement of the mounting to cut off the then projecting section of the web material and leave the remainder of the web material with a cut edge at the positions of the linear cutting edge, said apparatus having, in addition to said final advancing means and said final clamping means, primary advancing means and primary clamping means, said primary and final clamping means, and primary and final advancing means, being arranged to operate so that the primary advancing means advances the web material whilst the final clamping means is clamping it and the primary clamping means clamps the web material whilst the final advancing means is advancing it, the rate of the advancement by the primary advancing means being less than the rate of advancement by the final advancing means.
- 2. Apparatus according to claim 1 having displacing means for displacing said cut edge from the linear cutting edge across the direction of advancement of the web material said displacing means being mounted to travel with said blade having a circular cutting edge.
- 3. Apparatus according to claim 2 in which the displacing means is resiliently loaded by resilient means and is arranged to displace the cut edge by a forward movement produced by the resilient means, and to be given a return movement by the clamping means.
- 4. Apparatus according to claim 1 in which the final advancing means is arranged to be capable of advancing the web material by pulling it through a greater distance than the distance through which it has been advanced by the primary advancing means.
- 5. Apparatus according to claim 4 in which the final advancing means has rotary members for gripping and advancing the web material, said rotary members being driven by means, adapted by slipping to enable the rotary members to stop rotating when they have advanced the web through the distance through which it has been advanced by the primary advancing means.
- 6. Apparatus according to claim 5 in which the rotary members are driven by friction clutches.
- 7. Apparatus according to claim 1 in which the primary advancing means has primary advancing devices in the form of gripping members rotatable in gripping association with the web material.
- 8. Apparatus according to claim 7 in which the gripping members are crank-driven in an oscillatory manner.
- 9. Apparatus according to claim 7 in which the gripping members are retractable out of said gripping association and are provided with retracting means for so retracting them during advancement of the web material by the final advancing means.
- 10. Apparatus according to claim 1 having supply means for supplying the web material thereto in the form of a number n of webs superposed in face to face relationship said number n being at least 2 so that each of said sections is constituted by n plies.
Parent Case Info
This application is a continuation-in-part and division of our Application Ser. No. 851,907, filed Nov. 16, 1977, now U.S. Pat. No. 4,187,138 and relates to structural honeycomb materials formed from sheet material.
US Referenced Citations (4)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
851907 |
Nov 1977 |
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