GB721725A - Improvements in or relating to record card perforating machines - Google Patents

Improvements in or relating to record card perforating machines

Info

Publication number
GB721725A
GB721725A GB25978/52A GB2597852A GB721725A GB 721725 A GB721725 A GB 721725A GB 25978/52 A GB25978/52 A GB 25978/52A GB 2597852 A GB2597852 A GB 2597852A GB 721725 A GB721725 A GB 721725A
Authority
GB
United Kingdom
Prior art keywords
key
bars
punches
card
punching
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.)
Expired
Application number
GB25978/52A
Other languages
English (en)
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of GB721725A publication Critical patent/GB721725A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • B26F1/04—Perforating by punching, e.g. with relatively-reciprocating punch and bed with selectively-operable punches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
    • B26F1/36—Punching or perforating pliers

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
GB25978/52A 1951-11-17 1952-10-16 Improvements in or relating to record card perforating machines Expired GB721725A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE721725X 1951-11-17

Publications (1)

Publication Number Publication Date
GB721725A true GB721725A (en) 1955-01-12

Family

ID=6630123

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25978/52A Expired GB721725A (en) 1951-11-17 1952-10-16 Improvements in or relating to record card perforating machines

Country Status (2)

Country Link
GB (1) GB721725A (en:Method)
ZA (1) ZA17548B (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE33177E (en) * 1980-09-29 1990-03-06 Water Pollution Control Corporation In place gas cleaning of diffusion elements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE33177E (en) * 1980-09-29 1990-03-06 Water Pollution Control Corporation In place gas cleaning of diffusion elements

Also Published As

Publication number Publication date
ZA17548B (en:Method)

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