← Back to Patent Explorer
US3613859A Expired / Lapsed US ⏱️ 0.0 years remaining

Indexing crossband veneer for automatic plywood layup equipment

Assignee: Potlatch Forests Inc
•
Filing: 1969-04-09
•
Granted: 1971-10-19
•
Expires: 1989-04-09
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract An indexing mechanism is disclosed for intermittently feeding crossband veneer sheets to a plywood layup station. The indexing mechanism includes a vacuum feeder for successively conveying crossband veneer sheets to a stop means. The stop means includes a cylinder horizontally mounted transverse to the direction of travel with a flange thereon normally extending into the path of the sheets. The cylinder is rotated by a intermittent drive to intermittently feed the crossband to the plywood layup station with considerable precision.

Inventors

  • 👤 Harold Keller
  • 👤 Patrick J Young

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 18:28
CPC Classifications
B; B65; B65H; B65H9/00; B65H9/06

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 276 words
An indexing mechanism for intermittently feeding veneer core sheets perpendicular to the major dimension (crosswise) to a plywood layup station, said indexing mechanism comprising: a. a feeding means for successively feeding core sheets crosswise in a horizontal plane in a path toward the plywood layup station; b. an elongated stop means horizontally mounted for rotational movement in a single direction about a horizontal axis which is vertically spaced from the horizontal plane, said stop means having a length substantially equal to or greater than the length of the core sheets, said stop means having an abutment extending radially therefrom for projecting into the path of the sheets wherein the abutment has an abutment surface facing in the opposite direction to the direction of rotation for receiving the leading edge of each sheet to stop the movement of said sheet and to align the leading edge of the said sheet parallel with the horizontal axis; c. an intermittent drive operatively connected to the stop means for intermittently rotating the stop means 360* to remove the abutment from the path of the first sheet to permit the forward movement of the sheet and to reposition the abutment in the path of the succeeding second sheet in preparation for receiving the leading edge of the succeeding second sheet against the abutment surface in which the intermittent drive rotates the stop means to bring the abutment against the trailing end of the first sheet to deflect said trailing end vertically out of the path of the succeeding second sheet to receive the leading edge of the succeeding second sheet against the abutment surface with the first and second sheets overlapping.
Claim 2
Dependent Claim 276 words
An indexing mechanism for intermittently feeding veneer core sheets perpendicular to the major dimension (crosswise) to a plywood layup station, said indexing mechanism comprising: a. a feeding means for successively feeding core sheets crosswise in a horizontal plane in a path toward the plywood layup station; b. an elongated stop means horizontally mounted for rotational movement in a single direction about a horizontal axis which is vertically spaced from the horizontal plane, said stop means having a length substantially equal to or greater than the length of the core sheets, said stop means having an abutment extending radially therefrom for projecting into the path of the sheets wherein the abutment has an abutment surface facing in the opposite direction to the direction of rotation for receiving the leading edge of each sheet to stop the movement of said sheet and to align the leading edge of the said sheet parallel with the horizontal axis; c. an intermittent drive operatively connected to the stop means for intermittently rotating the stop means 360* to remove the abutment from the path of the first sheet to permit the forward movement of the sheet and to reposition the abutment in the path of the succeeding second sheet in preparation for receiving the leading edge of the succeeding second sheet against the abutment surface in which the intermittent drive rotates the stop means to bring the abutment against the trailing end of the first sheet to deflect said trailing end vertically out of the path of the succeeding second sheet to receive the leading edge of the succeeding second sheet against the abutment surface with the first and second sheets overlapping.
Claim 3
Dependent Claim 67 words
An indexing mechanism as defined in claim 1 wherein the stop means includes an elongated cylinder having an outer radius equal to or greater than the distance from the horizontal axis to the horizontal plane for supporting the sheets with said abutment extending outward from the cylinder and the abutment surface inclined to a radius of the cylinder in a direction oppOsite to the direction of rotation.
Claim 4
Dependent Claim 61 words
An indexing mechanism as defined in claim 1 wherein the feeding means includes a vacuum feeder having a plurality of rotating rollers spaced along the bottom thereof for successively conveying the sheets crosswise in a horizontal plane against the abutment and for conveying the sheet past the stop means when the abutment is rotated out of the path of the sheets.
Claim 5
Dependent Claim 226 words
An indexing mechanism for intermittently feeding plywood veneer sheets to a layup station; a. a continuously moving conveying means for supporting and successively moving the sheets along a selected path at a prescribed speed to the layup station; b. stop means mounted along the selected path upstream of the layup station, said stop means having an abutment surface that is rotatable about an axis transverse to the selected path for projecting into and out of the path of sheets; and c. an intermittent drive means operatively connected to the stop means for intermittently rotating the abutment surface into the path of the sheets to engage a leading edge of a sheet to stop the movement of the sheet on the continuously moving conveying means and align the leading edge of the sheet with the transverse axis and for subsequently rotating the abutment surface at a sufficiently slow acceleration to allow the continuously moving conveying means to accelerate the stopped sheet to the prescribed speed while maintaining the abutment surface in engagement with the leading edge until the stop sheet is accelerated to the prescribed speed to maintain the leading edge alignment during the sheet acceleration and then rotating the abutment surface at a faster acceleration to disengage the abutment surface from the leading edge and move the abutment surface out of the path of the sheets.
Claim 6
Dependent Claim 226 words
An indexing mechanism for intermittently feeding plywood veneer sheets to a layup station; a. a continuously moving conveying means for supporting and successively moving the sheets along a selected path at a prescribed speed to the layup station; b. stop means mounted along the selected path upstream of the layup station, said stop means having an abutment surface that is rotatable about an axis transverse to the selected path for projecting into and out of the path of sheets; and c. an intermittent drive means operatively connected to the stop means for intermittently rotating the abutment surface into the path of the sheets to engage a leading edge of a sheet to stop the movement of the sheet on the continuously moving conveying means and align the leading edge of the sheet with the transverse axis and for subsequently rotating the abutment surface at a sufficiently slow acceleration to allow the continuously moving conveying means to accelerate the stopped sheet to the prescribed speed while maintaining the abutment surface in engagement with the leading edge until the stop sheet is accelerated to the prescribed speed to maintain the leading edge alignment during the sheet acceleration and then rotating the abutment surface at a faster acceleration to disengage the abutment surface from the leading edge and move the abutment surface out of the path of the sheets.

References Cited (Backward Citations)

US1705505A Cited
US3194382A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-10-18 1975-04-19 1975-10-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-10-18 1979-04-19 1979-10-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-10-18 1983-04-19 1983-10-19 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag