  In the present paper, firstly we obtain the general expression of the canal
hypersurfaces which are formed as the envelope of a family of pseudo
hyperspheres, pseudo hyperbolic hyperspheres and null hypercones in $E_{1}^{4}$
and give their some geometric invariants such as unit normal vector fields,
Gaussian curvatures, mean curvatures and principal curvatures. Also we give
some results about their flatness and minimality conditions and Weingarten
canal hypersurfaces. Also, we obtain these characterizations for tubular
hypersurfaces in $E_{1}^{4}$ by taking constant radius function and finally we
construct some examples and visualize them with the aid of Mathematica.
