CA2174576A1

CA2174576A1 - Cutting jig

Info

Publication number: CA2174576A1
Application number: CA 2174576
Authority: CA
Inventors: Heinrich Johannes Hess
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-19
Filing date: 1996-04-19
Publication date: 1997-10-20

Abstract

A cutting jig or cutting guide for foam tube and like products comprises a channel member with opposed uprights sidewalls to accommodate therebetween a tube to be cut, pairs of aligned grooves being provided in the sidewalls to serve as guides for a cutting blade. Fillet portions are provided between the sidewalls and the base to provide a profile having at least four facets to support the tube. Preferably, the profile comprises a section of an octagon. At least one insert may be provided, having similar inner and outer profiles to that of the sidewalls and base, and dimensioned to nest therein. The insert may also be dimensioned so as to elevate the tube to a height relative to the cutting grooves as compared with a larger tube in the base unit. The cutting jig sidewalls may further comprise at least one pair of identical notches, one in each of the sidewalls, the insert being dimensioned relative to the notch to maintain a corresponding depth of cut for a smaller pipe. A pair of inserts may be provided, a larger one of the inserts to fit the base unit and a smaller of the inserts to fit into the larger insert in nesting protrusion the larger insert and base unit having one or more pairs of acooperating protrusion and recess to locate the larger insert relative to the base unit longitudinally, and the smaller insert and larger insert having at least one pair of a cooperating protrusion and recess to locate the smaller insert longitudinally relative to the larger insert, each pair of a protrusion and a recess being arranged so as to limit insertion of the corresponding insert to one direction only.

Description

2i~45~6 The invention relates to cutting jigs and especially cutting jigs for tubular products such as foam pipe insulation.
When installing foam pipe insulation, various types of cut are needed. For example, a 45 degrce mitre may be needed where the pipes intersect at right angles, a rectangular notch where a joist or beam is to be crossed, 22.5/67.5 mitre where a 45 degree elbow is required, and so on. Such foam tubing collapses and creases and must be restored to its proper round shape and supported fully to enable accurate cuts to be made. ~ ~u~ iOllal mitre block, such as is used for cutting wooden mouldings, is not suitable for foam pipe insulation and like products which are relatively soft and flexible.
0 According to the present invention, a cutting jig or cutting guide for foam tube and like products comprises a channel member with opposed uprights sidewalls to :1~ ' a tube to be cut between the sidewalls, pairs of aligned grooves in the sidewalls to serve as guides for a cutting blade, and olilll~ of the invention will now be described by way of example only with reference to the àCCU~ lllyill~ drawings in which:
Figure 1 is a set of drawings illustrating types of joints to be made using the cutting jig of the present invention;
Figure 2 is an exploded perspectiYe view of hte cutting jig;
Figure 3 is a COll~,o~ ' n" end view;
Figure 4 is a CUII~,O~)OIn]ill~ top view;
Figure 5 shows a first liner part of the cutting jig;
Figure 6 shows a second liner part of the cutting jig;
Figure 7 is a bottom view of the cutting jig;
Figure 8 is an end view of the base unit of the cuning jig;
Figure 9 is a the other end view;
Figure 10 is a side view of the base unit;
Figure 11 is the other side view of the base unit.

21 74~76 .
rHE P~PE TAILOR
'i~o PTp- Tai'ilor is used to quickly achievc tight, 1/2" liner willlin Ihe. 3 j~ r~r. lJsinci ~h- Plp~ T~~lo -cllessioncll looking energy conserving joinls in ~oam pipe lo riccuralely cul ~oam pi~e insulalil-~n is besl clone ~Vi~
sulalio~. Iong sllcrp l~lqde in c ulil;ly lr.;le. T~iin saw blados as ir~ .
r I ' I)ir~r in~ulc~ir~1, relrlovr~ 1~o~ nArs ~lom Tl-0 Plp0 h~( ksaw can also be IJsed. Tlie Icllowing irl5lr~JCIi~.
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r~ c~li on ihe pro slil ~ic~
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r~
.~ q ~ 1~ ~ 5. For notchcs whert . For a 45 elbow use the 22 1/2~' _ ~~ _ ~ plu~rnbin,~a Pir~o is~atl~tche ' ------~ ~ c,ingle guide ~o mako a h1i~re jciint. ~c~- , nc1tth guiie to trim ~nsvi I ~ AP N~te: The nc~lcl~ m ~s~
t ¦ ~ M~A IWO VO~I;C~JI ~ A
- ~ - c~ II,e clesired ll.calirlns b. Fol long nokhes~ slicde insulalion througll guide v~ilh ~. . . PIIJr~ge l~e kAife 1~ I!,e ~ -knlfe held In positlon for leclulred length, ~\tt~, ;corllal or bol~om of rlrllch vollical culs.
;~", .,.,.,A~9, .,., Reverse blade ancd cul b I 1~ - o ~t ~
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Claims

1. A cutting jig or cutting guide for foam tube and like products comprises a channel member with opposed uprights sidewalls to accommodate therebetween a tube to be cut, pairs of aligned grooves being provided in the sidewalls to serve as guides for a cutting blade, and fillet portions being provided between the sidewalls and the base to provide a profile having at least four facets to support the tube.

2. A cutting jig as defined in claim 1 wherein the profile comprises a section of an octagon.

3. A cutting jig as defined in claim 1, further comprising an insert having similar inner and outer profiles to that of the sidewalls and base, and dimensioned to nest therein.

4. A cutting jig as defined in claim 3, wherein the insert is dimensioned so as to elevate the tube to a predetermined height relative to the cutting grooves as compared with a larger tube in the base unit.

5. A cutting jig as defined in claim 1, further comprising at least one pair of identical notches, one in each of the sidewalls, the insert being dimensioned relative to the notch to maintain a corresponding depth of cut for a smaller pipe relative

6. A cutting jig as defined in claim 1, further comprising a pair of inserts, a larger one of the inserts to fit the base unit and a smaller of the inserts to fit into the larger insert in nesting configuration, the larger insert and base unit having one or more pairs of a cooperating protrusion and recess to locate the larger insert relative to the base unit longitudinally, and the smaller insert and larger insert having at least one pair of a cooperating protrusion and recess to locate the smaller insert longitudinally relative to the larger insert, each pair of a protrusion and a recess being arranged so as to limit insertion of the corresponding insert to one direction only.