CA2271576A1 - A perforating blade and signature - Google Patents

A perforating blade and signature

Info

Publication number
CA2271576A1
CA2271576A1 CA002271576A CA2271576A CA2271576A1 CA 2271576 A1 CA2271576 A1 CA 2271576A1 CA 002271576 A CA002271576 A CA 002271576A CA 2271576 A CA2271576 A CA 2271576A CA 2271576 A1 CA2271576 A1 CA 2271576A1
Authority
CA
Canada
Prior art keywords
angled
blade
cutting edge
signature
sections
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002271576A
Other languages
French (fr)
Other versions
CA2271576C (en
Inventor
Thomas Foster
Rodney Michalk
Scott Summers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUREPERF Inc
Original Assignee
Sureperf, Inc.
Thomas Foster
Rodney Michalk
Scott Summers
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/303,946 external-priority patent/US5524930A/en
Application filed by Sureperf, Inc., Thomas Foster, Rodney Michalk, Scott Summers filed Critical Sureperf, Inc.
Publication of CA2271576A1 publication Critical patent/CA2271576A1/en
Application granted granted Critical
Publication of CA2271576C publication Critical patent/CA2271576C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

A perforating blade (10), and signature (32) produced therewith, having a unitary blade (12) that is very narrow in width in proportion to its length, with a cutting edge (16) along one longitudinal side. The cutting edge (16) comprises a combination of a number of spaced-apart straight (22) and angled (20) sections arranged so that the angled sections (20) angle inwardly toward a center point (18) on the perforating blade and along a single side of the cutting edge only. Since the angled sections (20) are all angled to the same side of the blade, the resulting fold line (26) has cuts only on one side (29) thereof. The angled cuts result in ties (28) that twist easily, and that, therefore, result in fold lines (26) that fold cleanly without gusseting or binding.
CA002271576A 1994-09-09 1995-09-07 A perforating blade and signature Expired - Fee Related CA2271576C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/303,946 1994-09-09
US08/303,946 US5524930A (en) 1994-09-09 1994-09-09 Perforating blade and signature
CA002199118A CA2199118C (en) 1994-09-09 1995-09-07 A perforating blade and signature

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002199118A Division CA2199118C (en) 1994-09-09 1995-09-07 A perforating blade and signature

Publications (2)

Publication Number Publication Date
CA2271576A1 true CA2271576A1 (en) 1996-03-14
CA2271576C CA2271576C (en) 2003-08-26

Family

ID=27805848

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002271576A Expired - Fee Related CA2271576C (en) 1994-09-09 1995-09-07 A perforating blade and signature

Country Status (1)

Country Link
CA (1) CA2271576C (en)

Also Published As

Publication number Publication date
CA2271576C (en) 2003-08-26

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20130909