BS 4623:1989 download free

06-14-2021 comment

BS 4623:1989 download free.Specification for Folded continuous stationery for impact printers.
1 Scope
BS 4623 specifies requirements for sprocket-holed folded continuous stationery for use with impact printers in association with automatic data processing (ADP) machines.
BS 4623 does not specify requirements for stationery used with on-line data teleprinters or other machines with non-adjustable pin-feed platens, or for stationery used with laser printers.
NOTE 1 Information that should accompany an order for stationery is given in Appendix A, and recommended properties for inclusion in the purchaser’s order for paper are given in Appendix B.
NOTE 2 The titles of the publications referred to in BS 4623 are listed on the inside back cover.
2 Definitions
For the purposes of BS 4623 the following definitions apply.
form set
one or more parts assembled as one or more layers of paper, together with any interleaved copy-producing material
a layer of paper in a set
NOTE The number of layers is expressed as “single.part set”, “two.part set”, “three-part set”, etc. Interleaved copy-producing material does not constitute a part.
vertical reference line
the best-fitting line through the centres of the sprocket holes at the left-hand edge of the stationery (see Figure 3)
horizontal reference line
the line, at right angles to the vertical reference line, through the centre of the sprocket hole immediately below a horizontal fold and at the left-hand edge (see Figure 3)
stationery width
the edge-to-edge width of the paper, measured parallel to the horizontal reference line
an individual document
form depth
the distance from the top to the bottom of a form, measured parallel to the vertical reference line
form width
the distance from one side to the opposite side of a form, measured parallel to the horizontal reference line
NOTE The size of a form is described by stating first the depth and then the width. The size is unambiguous only when it refers specifically to trimmed or untrimmed size.
two deep
two forms, one above the other, between successive horizontal folds (see Figure 1)
NOTE Similarly the term “three deep” is used.
two wide
two forms side by side within the width of the stationery (see Figure 2)
NOTE Similarly the term “three wide” is used.
a continuous length of stationery folded at regular intervals in concertina fashion
a break dividing two packs
ridging along folds so that the stationery cannot be depressed flat on to a surface to give a free-flowing run into a machine
waste resulting from punching of sprocket holes
3 Designation
Stationery shall be designated by the form depth
and stationery width (see clauses 6 and 7).
4 Conditioning and measuring
Before determining the dimensions specified in clauses 5 to 9. the stationery shall be conditioned, as described in BS 3431, in an atmosphere at 23 ± I °C and 50 ± 2 % r.h.
NOTE For recommendations on conditions for storage see Appendix C.
5 Sprocket holes
5.1 General. To enable the stationery to be fed through a printer, sprocket holes shall he cleanly punched in the left-hand and right-hand margin (see Figure 3).
The holes shall either be circular or have a serrated or a scalloped edge.
5.2 Vertical spacing. In each margin the holes shall be nominally spaced with 0.5 in (12.7 mm) between centres. The distance between centres of adjacent holes shall be 0.5 ± 0.002
in (12.7 * 0.05 mm). The distance between the centre of a hole and the centre of any of the 20 holes on either side shall not differ from the nominal distance between centres by more
than 0.0 12 in (0.30 mm).
5.3 Skew. The centre of each hole in the right-hand margin shall be not further than 0.006 in (0.15 mm) from the horizontal line through the centre of the corresponding left-hand hole and perpendicular to the vertical reference line.
5.4 Horizontal spacing. The distance between the centre of each hole and the nearer paper edge shall be 0.236 ± 0.028 in (6.0 ± 0.7 mm). The distance between the centre of a hole and the best-fitting common centre line of the holes in the row shall be not greater than 0.004 in (0.10 mm).
Over any 10 in (254 mm) length of stationery, the distance between the vertical reference line and the best-fitting common centre line of the right-hand holes shall not differ by more than 0.005 in (0.125 mm), measured parallel to the horizontal reference line.
5.5 Hole diameters
5.5.1 Circular holes. The diameter of the holes shall be 0.156 ± 0.004 in (4.0 ± 0.10 mm). The diameter of holes through carbon paper, if used, shall be slightly larger than that of the holes through the paper.
8 Folds, perforations and joins
8.1 The folds shall coincide with the perforations. They shall be perpendicular to the vertical reference line and within 0.0 16 in (0.4 mm) of the line midway between adjacent sprocket holes.
8.2 If the stationery contains a divided form, or forms two or more deep, intermediate perforations may he additionally made across the stationery, but these shall not run into a sprocket hole.
NOTE For optimum performance the perforations should be straight, clean cuts. It is recommended that any intermediate perforations be positioned midway between the adjacent sprocket holes, and that the end ties of a perforation should be longer than the other ties (see Figure 4).
8.3 Stationery shall not contain joins.
9 Form set thickness
The form set thickness shall be constant over the printing area.
10 Packaging
10.1 Boxes. Stationery shall be supplied in a box with a separate lid.
The contents of boxes shall be easily identifiable, with the relevant form number, together with the form description clearly visible.
NOTE The size of the box should be chosen with regard to the maximum mass of contents (see BS 1133.7), and both box and lid should be sufficiently strong to protect the contents from damage during normal commercial handling, during delivery and during storage.
10.2 Filling. The first form in each box shall face upwards; i.e. its face shall be immediately visible when the box is opened.
The stationery in each box shall either be continuous or have only one split.
NOTE It is recommended that boxes should be overfihled so that there is virtually no movement of the contents once the boxes are closed. However, boxes should not be so overfilled that when
stacked there is print offset from one form to another.
10.3 Splits. If a box contains a split, the lower pack shall be placed in the box in the same manner as the first pack so that before feeding the lower pack into a machine, there is no need to turn the second pack or the box.
If a box contains a split, a paper strip of a colour contrasting with that of the stationery shall be wrapped round the upper pack.
Boxes containing splits shall have this fact
prominently displayed so that it is visible when the closed box is in a stack.
NOTE Unless the lid completely covers the sides of the box, this should be displayed on the sides of the box rather than on its lid.

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