Remove line from Header

Question

I am using

\usepackage{fancyhdr}
\pagestyle{fancy}
........
\lhead{My Name}

This setup creates header with a horizontal line.

1. How can I remove line appearing in header?
2. When I convert this document to pdf it creates one inch extra space in my header. This space does not show up in dvi display or in postscript file. But does show up in pdf. How can I remove extra space in pdf?

\documentclass[10pt, twocolumn]{article}

\usepackage {amsfonts}
\usepackage{mathtools, fancyhdr}
\usepackage{IEEEtrantools}

\pagestyle{fancy}
\addtolength{\evensidemargin}{-1cm}
\addtolength{\oddsidemargin}{-1cm}
\setlength{\parindent}{0in}
\setlength{\parskip}{6pt}

\renewcommand{\headrulewidth}{0pt} 

\usepackage[margin=0.7in, headsep=4pt]{geometry} 

\begin{document}
\chead{My Name, Date...... }

\begin{IEEEeqnarray*}{lcr}
e^{-at} \hspace{1cm} \sin bt & \frac{b}{(s+a)^2+b^2} \hspace{1cm} & s>-a\\
\end{IEEEeqnarray*}
\end{document}

Answer 1

You can set the width of the rules using

\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}

That should effectively make them disappear.

Answer 2

For the solution to the second problem, you should remove the headsep=4pt from the geometry package settings or reduce its value. That removes or reduces the space between the header and the top edge of the page.

I am not sure why you are using headsep in geometry package if you don't want extra spaces in header.