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US3785231A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus for cutting blanks

Assignee: Pak Well Corp
•
Filing: 1972-08-18
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Granted: 1974-01-15
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Expires: 1992-08-18
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Abstract

Abstract Apparatus for cutting blanks from a sheet. A method of cutting such blanks using a cutting table and cutting die which are relatively movable to position the die over different regions of a sheet to ready the die for cutting. The apparatus specifically disclosed comprises a die press having a vertically movable cutting die which is forced downwardly to cut a blank. A horizontally disposed cutting table below the die is movable in increments along a horizontal path between retracted and extended positions, to advance sheets supported on the table to different positions under the die. A sheet is supplied to the cutting table from a support table disposed at one end of the cutting table with the latter in its retracted position. Sheets are deposited on such support table from a supply. Sheets moved off the cutting table move over a drop table and thence onto an ejector table, such tables being aligned in a direction extending transversely of the path of movement of the cutting table. Clamps on the cutting table hold a side margin of a sheet, with the sheet edge bounding such side margin positioned parallel to the path of movement of the cutting table and remote from the side of the cutting table which is adjacent the drop table. Using the method of the invention, these clamps are released in succession, and the cutting of blanks is performed using a last sequence of cuts which occurs along the side margin of the sheet held by the clamps.

Inventors

  • 👤 W Lake
  • 👤 J Ward

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 11:33
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/38; B26F1/40; B26F1/405; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0505; Y10T83/051; Y10T83/0524; Y10T83/0577; Y10T83/202; Y10T83/2074; Y10T83/2079; Y10T83/2092; Y10T83/2198

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 149 words
Apparatus for cutting blanks from a sheet comprising a die press, including a vertically movable cutting die which is forced downwardly to cut a blank, a horizontally disposed cutting table positioned below said die, said cutting table and die being relatively movable in increments along a horizontal path to place a sheet supported on the cutting table at different positions under the die, a horizontal support table for holding a sheet in readiness for cutting aligned along said path with the cutting table and located directly adjacent an end of the cutting table, and a hinged drop table located to one side of the cutting table having a raised position where the drop table forms a horizontal extension of the cutting table in a zone extending transversely of said path, said drop table having a lowered position to open said zone for an operator positioned adjacent the cutting table.
Claim 2
Dependent Claim 149 words
Apparatus for cutting blanks from a sheet comprising a die press, including a vertically movable cutting die which is forced downwardly to cut a blank, a horizontally disposed cutting table positioned below said die, said cutting table and die being relatively movable in increments along a horizontal path to place a sheet supported on the cutting table at different positions under the die, a horizontal support table for holding a sheet in readiness for cutting aligned along said path with the cutting table and located directly adjacent an end of the cutting table, and a hinged drop table located to one side of the cutting table having a raised position where the drop table forms a horizontal extension of the cutting table in a zone extending transversely of said path, said drop table having a lowered position to open said zone for an operator positioned adjacent the cutting table.
Claim 3
Dependent Claim 31 words
The apparatus of claim 1, wherein the drop table is hinged to drop from a horizontal to a lowered vertical position, and power-operated means is provided for operating the drop table.
Claim 4
Dependent Claim 59 words
The apparatus of claim 2, which further includes an ejector table having a position aligned with said drop table in a direction extending transversely of said path, said ejector table having a horizontal position and being mounted for inclining movement to incline the table from its horizontal position thus to promote gravity-induced sliding of material off the ejector table.
Claim 5
Dependent Claim 23 words
The apparatus of claim 3, which further comprises power-operated means for inclining the ejector table and holding the same in its inclined position.
Claim 6
Dependent Claim 88 words
The apparatus of claim 1, which further includes an ejector table aligned with said drop table in a direction extending transversely of said path, said ejector table having a horizontal position and being mounted for inclining movement to incline the table thus to promote gravity-induced sliding of material off the table, and vertically shiftable lifter means registering with apertures in said ejector table when the latter is in its said horizontal position, said shifter means being movable upwardly through said apertures to displace material on the ejector table.
Claim 7
Dependent Claim 76 words
The apparatus of claim 1, which further comprises first and second clamps mounted on said cutting table positioned to engage a side margin of a sheet with such side margin positioned parallel to said path and adjacent the side of the cutting table opposite its said one side, one of said clamps being adjacent said end of the cutting table and remote from the other clamp which is adjacent the opposite end of the cutting table.

References Cited (Backward Citations)

US1596512A Cited
US2822004A Cited
US3129622A Cited
US3391590A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-01-14 1977-07-16 1978-01-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-01-14 1981-07-16 1982-01-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-01-14 1985-07-16 1986-01-15 $7700.00 Window Closed / Lapsed

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